High-Performance Batteries: Energy Density vs. Power Density

Learn how energy density and power density affect high performance batteries, runtime, output, size, thermal demands, and custom battery pack design.

High-Performance Batteries Explained: Energy Density vs. Power Density

When engineers evaluate high performance batteries, capacity is only one part of the equation.

Two batteries can have similar physical dimensions or stored energy but perform very differently once they are integrated into an application. One may be optimized to operate for a long time between charges, while another may be designed to deliver a large amount of power within seconds.

This difference often comes down to two important battery performance metrics: energy density and power density.

Understanding the difference between them can help OEMs make better decisions about cell chemistry, battery size, discharge requirements, thermal management, and overall battery pack design.

What Is a High-Performance Battery?

A high performance battery is not simply a battery with the highest capacity or highest energy density.

Performance depends on what the application actually requires.

For one device, high performance may mean maximizing operating time while minimizing battery weight. For another, it may mean supplying a high current during startup or supporting repeated power pulses. Other applications may prioritize cycle life, temperature performance, reliability, packaging flexibility, or a combination of these requirements.

That is why battery selection should begin with the application rather than a single specification.

Through our custom battery design services, we evaluate electrical, mechanical, safety, and application requirements before developing a battery pack around the needs of the product.

What Is Battery Energy Density?

Energy density describes how much energy a battery can store relative to its mass or volume.

It is commonly expressed in two ways:

Gravimetric energy density or specific energy: watt-hours per kilogram (Wh/kg)
Volumetric energy density: watt-hours per liter (Wh/L)

Natural Resources Canada defines energy density as the amount of energy stored relative to battery mass or volume. It also notes that energy density generally decreases as the measurement moves from active materials to cells, modules, and complete packs because components such as enclosures and thermal-management systems add weight and volume without adding stored energy.

For product engineers, this distinction matters.

A cell-level energy-density figure should not automatically be treated as the energy density of the finished battery pack.

Why Does High Energy Density Matter?

Higher energy density can help an OEM achieve objectives such as:

Longer runtime without substantially increasing battery weight
More stored energy within a limited physical space
Smaller or lighter portable products
Greater design flexibility where battery volume is constrained

The U.S. Department of Energy explains that increasing volumetric energy density can allow an electric vehicle, for example, to travel farther without increasing battery-pack size or potentially achieve the same range with a smaller pack.

The same basic design principle applies beyond vehicles. Medical equipment, instrumentation, communications systems, tracking devices, portable electronics, and other battery-powered products can all face limitations on available weight or space.

We develop custom lithium-ion battery packs for applications where size, weight, voltage, current requirements, safety, and reliability need to be considered together.

What Is Battery Power Density?

If energy density describes how much energy is available, power density describes how rapidly that energy can be delivered.

Power density may be expressed as:

Watts per kilogram (W/kg)
Watts per liter (W/L)

Natural Resources Canada describes power density as a battery’s rate capability, or the flow of energy into or out of the battery during charging and discharging relative to mass or volume.

Power requirements also need context. Factors such as discharge rate, temperature, state of charge, pulse duration, and whether the specification refers to continuous or pulse power can affect battery performance.

Why Does High Power Density Matter?

Some applications have relatively stable electrical loads. Others may suddenly require much more current.

High power capability becomes particularly important when equipment must support:

High-current startup
Motors or actuators
Short power bursts
Rapid acceleration
High-load communications
Pulsed equipment
Other demanding electrical loads

In these cases, simply choosing a battery with high capacity does not guarantee that it can safely provide the required current.

Energy Density vs. Power Density: What Is the Difference?

A simple way to understand the distinction is:

Energy density tells you how much energy the battery can carry. Power density tells you how quickly the battery can deliver it.

Metric	Energy Density	Power Density
Main question	How much energy can the battery store?	How quickly can the battery deliver energy?
Common units	Wh/kg or Wh/L	W/kg or W/L
Major design consideration	Runtime, size and weight	Current output and load demand
Important for	Long-duration operation	High-load or pulse operation
Higher value generally supports	More energy in less mass or volume	Greater power delivery relative to mass or volume

Both measurements are important, but neither should be evaluated independently from the application.

High Energy Battery vs. High Power Battery

Consider two hypothetical products.

Product A is a portable monitoring device expected to operate for long periods between charges. Its current demand is relatively modest.

Its design may prioritize:

high energy density → more stored energy → longer potential runtime

Now consider Product B, which contains a motor that creates a substantial temporary load during startup.

Its battery may need to prioritize:

high power capability → greater current delivery → better support for peak loads

Selecting a high-energy cell without verifying its discharge capability could result in poor performance in Product B. Likewise, optimizing Product A exclusively for high power could sacrifice energy capacity that would have been more valuable for its actual duty cycle.

This is why battery engineering is fundamentally an optimization problem rather than a search for the battery with the largest specification number.

Can a Battery Have Both High Energy and High Power Density?

Battery technology can provide combinations of strong energy and power performance, but engineering trade-offs remain.

Cell chemistry, electrode design, internal resistance, physical construction, thermal conditions, discharge rate, battery management, and other factors can influence how a battery performs.

Within lithium-ion chemistry, different formulations can favor different performance characteristics. Lithium cobalt oxide can provide high energy density, while lithium iron phosphate is often selected where discharge capability, cycle life, and thermal stability are important.

This makes chemistry selection an application-specific engineering decision rather than a universal ranking of one chemistry as “best.”

For a deeper technical discussion of this trade-off, see our guide to energy density vs. power density in battery pack design.

Why Cell-Level Specifications Are Not Enough

A common battery-selection mistake is comparing cells solely through datasheet specifications.

An OEM ultimately uses a battery system, not an isolated cell.

The completed pack may also include:

Battery management system
Protection electronics
Wiring and interconnects
Connectors
Mechanical enclosure
Insulation
Thermal-management components
Fuel-gauge electronics
Charging controls

These components affect the final pack’s mass, volume, electrical performance, safety, and reliability.

That is one reason we evaluate pack-level performance separately from cell-level performance when developing a custom solution.

How Battery Management Affects High Performance Applications

High performance batteries also need appropriate control and protection.

A battery management system may monitor or manage factors such as cell voltage, current, temperature, charging, discharge limits, state of charge, and cell balancing depending on the battery design.

This becomes particularly important as electrical and thermal demands increase.

Our smart battery design capabilities include protection circuits, fuel gauges, charger-control PCBAs, and battery management systems.

The objective is not simply to select a high-performance cell. We look at the entire battery pack as an integrated system.

Temperature Matters Too

Battery performance figures should not be evaluated without considering operating conditions.

Temperature can affect electrochemical reaction rates and battery performance. A battery that meets a power requirement under controlled laboratory conditions may behave differently when used in an application exposed to very low or high temperatures.

OEM requirements should therefore identify the expected operating environment early in the development process.

This can influence cell selection, enclosure design, thermal management, BMS parameters, testing, and potentially the physical size of the finished battery.

How Should OEMs Choose Between Energy and Power?

Instead of beginning with “What battery has the highest energy density?”, engineering teams should define what the finished product needs the battery to do.

Important questions include:

How much energy does the product consume during a typical operating cycle?
What runtime is required?
What is the average electrical load?
What is the maximum continuous load?
Are there short-duration peak loads?
How much space is available for the battery?
What is the maximum acceptable battery weight?
What temperatures will the product encounter?
What charging time is acceptable?
What cycle-life expectations does the product have?
What safety or regulatory requirements apply?
Does the application require a custom BMS, enclosure, connector, or communication system?

Once these requirements are defined, engineers can evaluate energy density and power density in the context of the entire system.

Our broader battery engineering and manufacturing capabilities support multiple battery chemistries and applications, including lithium-ion, lithium-polymer, lithium iron phosphate, lithium primary, and nickel-metal hydride solutions.

Energy Density and Power Density Are Only Part of Battery Performance

A high performance battery should not be evaluated using one metric.

Energy density and power density need to be considered alongside:

Safety
Cycle life
Calendar life
Operating temperature
Charging characteristics
Internal resistance
Mechanical requirements
Battery management
Reliability
Manufacturing consistency
Regulatory requirements
Cost and supply availability

A battery with exceptional energy density but inadequate discharge capability may be wrong for a high-load device.

A battery with exceptional power capability but insufficient energy storage may require an unnecessarily large pack to achieve the required runtime.

The appropriate battery is the one that achieves the right balance for the actual product.

Frequently Asked Questions

What is energy density in a battery?

Battery energy density describes how much energy a battery stores relative to its mass or volume. Gravimetric energy density is typically expressed in Wh/kg, while volumetric energy density is typically expressed in Wh/L.

What is power density in a battery?

Power density describes how rapidly a battery can deliver energy relative to its mass or volume. It is commonly expressed in W/kg or W/L.

Is higher energy density always better?

No. Higher energy density can be valuable when runtime, weight, or available space is important, but battery selection also needs to account for power requirements, temperature, safety, cycle life, charging, physical design, and other application requirements.

What is the difference between energy density and battery capacity?

Battery capacity describes the amount of electrical charge a battery can provide and is commonly stated in ampere-hours (Ah). Energy considers both capacity and voltage and is expressed in watt-hours (Wh). Energy density relates that stored energy to the battery’s mass or volume.

Does higher power density mean longer battery life?

Not necessarily. Power density describes how quickly energy can be delivered, while energy density is more closely associated with how much energy can be stored for a given mass or volume. Runtime depends on the battery’s usable energy and the application’s load profile.

Which battery chemistry is best for high performance applications?

There is no single best chemistry for every high-performance application. The appropriate chemistry depends on required energy, power, cycle life, operating temperature, size, weight, safety requirements, charging characteristics, cost, and other design constraints.

Build the Battery Around the Application

For OEM product development, the question should not be whether energy density or power density is more important in general.

The better question is:

What combination of energy, power, size, weight, safety, runtime, and lifecycle does this specific product require?

Answering that question early can help engineering teams make better decisions about cell chemistry, pack architecture, electronics, thermal requirements, mechanical design, and testing.

At Emerging Power, we work with OEMs to develop custom battery solutions around specific electrical and mechanical requirements, from initial technical review and battery design through prototyping, testing, and manufacturing.

Request a quote to discuss your application’s energy, power, size, operating environment, and performance requirements.

3D Modeling for 3D Printing in Battery Development

Developing a custom battery pack involves much more than selecting cells and connecting them to a battery management system. The battery also has to fit within the product, accommodate electronics and wiring, meet mechanical requirements, provide access to connectors, and ultimately work within the OEM’s finished assembly.

That is where 3D modeling for 3D printing can become an important part of battery development.

Instead of waiting until production tooling is created to discover a mechanical issue, engineers can develop a digital 3D model, convert that design into a physical prototype, evaluate the result, make changes, and print another version.

This iterative approach can help identify mechanical and integration issues earlier in the development process and complements a structured custom battery pack design workflow.

For OEMs developing custom battery-powered products, moving efficiently from 3D model to physical prototype can reduce unnecessary design iterations later in the project and provide engineers with something they can physically inspect before committing to production.

What Is 3D Modeling for 3D Printing?

3D modeling is the process of creating a digital representation of a physical component using computer-aided design (CAD) software.

For battery development, a 3D model may represent:

The battery pack enclosure
Individual cells or cell groups
Battery management system components
Printed circuit boards
Connectors
Wiring and cable routing
Mounting points
Fasteners
Internal supports
Product interfaces

Once the model is ready, the digital design can be prepared for additive manufacturing, commonly known as 3D printing.

Unlike traditional subtractive manufacturing, where material is removed from a larger piece, additive manufacturing generally builds a component layer by layer according to digital design data.

According to the National Institute of Standards and Technology’s guide to additive manufacturing and 3D printing, additive manufacturing can support rapid prototyping, faster design iteration, customization, and the production of complex geometries.

For engineers, the important advantage is simple: a digital battery design can become a physical component that can be examined, assembled, measured, and revised.

Why Is 3D Modeling Important in Battery Development?

A battery pack must satisfy both electrical and mechanical requirements.

Engineers may identify an appropriate chemistry, voltage, capacity, discharge rate, and protection system, but the resulting battery still has to work within the physical constraints of the OEM’s product.

That introduces questions such as:

Does the battery fit within the available space?
Is there sufficient clearance around components?
Can the connector be reached easily?
Is there enough room for wiring?
Are mounting points positioned correctly?
Can the battery be installed and removed as intended?
Does the enclosure interfere with another component?
Can the pack be assembled efficiently?

A CAD model gives engineers an opportunity to examine these relationships digitally.

A 3D printed battery prototype takes the process a step further by allowing the design team to evaluate the geometry as a physical object.

That transition from screen to physical prototype can expose practical issues that may be difficult to recognize from drawings alone.

Emerging Power’s smart battery design capabilities include mechanical 3D design for enclosures, turnkey designs, manufacturing fixtures, component drawings, and assembly documentation.

How Does 3D Modeling Speed Up Battery Development?

1. It Brings Mechanical Design Into the Process Earlier

Mechanical constraints should not be an afterthought in custom battery development.

The size and arrangement of cells, electronics, wiring, connectors, enclosure features, and mounting hardware can all influence the final battery configuration.

By developing a 3D model early, engineers can evaluate how these components interact before the design reaches production.

Emerging Power’s 3D printing capabilities can support this transition from digital design to physical prototype as part of the wider engineering process.

Bringing mechanical work into the development process earlier can help reduce the risk of discovering major fit or packaging issues after the design has advanced.

2. Engineers Can Move From CAD to a Physical Prototype Faster

Traditional prototype methods can require machining, fabrication, molds, or dedicated tooling.

For appropriate applications, 3D printing can remove some of those early tooling requirements.

Once a printable model has been prepared, a prototype can be produced directly from the digital design. If engineers identify a problem, they can modify the CAD file and create another version.

The development cycle becomes:

Model → Print → Evaluate → Modify → Reprint

rather than committing immediately to production tooling.

NIST identifies rapid prototyping and design iteration as important benefits of additive manufacturing because manufacturers can bypass some of the lead time and expense associated with tooling during development.

3. Physical Fit Can Be Checked Before Production

One of the most practical uses of 3D printing in battery development is evaluating form and fit.

A prototype enclosure can help engineering teams determine whether the battery’s physical dimensions work with the intended product.

For example, an OEM may need a battery pack to fit inside a compact industrial device while leaving sufficient space for:

A PCB
Connectors
Sensors
Wiring
Mounting hardware
Other internal components

A 3D printed enclosure can provide a physical representation of the proposed geometry.

If the enclosure is too large, a connector is poorly positioned, or installation is difficult, engineers have an opportunity to revise the design before moving further into manufacturing.

For projects where enclosure, electronics, chemistry, and certification need to be considered together, Emerging Power’s custom battery pack design checklist provides additional guidance on structuring the development process.

4. Complex Battery Enclosures Can Be Evaluated More Efficiently

Custom battery applications do not always fit standard rectangular housings.

Medical equipment, military systems, communications devices, instrumentation, industrial products, and portable electronics may impose strict space and packaging requirements.

3D modeling gives engineers greater freedom to investigate:

Irregular enclosure shapes
Internal support structures
Connector locations
Mounting features
Cell positioning
Cable paths
Component clearances

This is particularly useful when the battery must be designed around an existing product rather than the product being designed around a standard battery.

The result can be a more integrated approach to custom battery pack design.

For applications requiring high energy density and rechargeable power, engineers may also evaluate configurations involving custom lithium-ion battery packs alongside mechanical enclosure requirements.

5. Design Changes Can Be Tested Before Tooling

Production tooling represents a much larger commitment than changing a digital model.

Suppose a prototype reveals that a mounting feature needs to move several millimeters or that a connector opening needs additional clearance.

At the CAD stage, engineers can revise the model and produce another prototype.

If the same problem is discovered only after production tooling has been completed, correcting it may require significantly more rework.

This is one reason rapid prototyping is valuable: its purpose is not simply to make a sample. It creates an opportunity to find and address design issues while the product is still relatively easy to modify.

The broader manufacturing industry uses additive manufacturing for the same reason. The U.S. Department of Energy’s additive manufacturing resources discuss the role of additive manufacturing in advanced production and component development.

6. 3D Models Improve Communication Between Engineering Teams

Battery projects often involve multiple groups, including:

OEM product engineers
Battery engineers
Mechanical engineers
Electrical engineers
Manufacturing teams
Quality teams
Suppliers

A shared 3D model gives these groups a common representation of the proposed design.

Instead of relying entirely on written descriptions or two-dimensional drawings, teams can evaluate the geometry and component relationships more directly.

A physical prototype can make communication even easier.

Teams can point to specific features, test how parts interact, and document required changes before the next design iteration.

From 3D Model to Battery Prototype: A Typical Development Process

Although every battery project has different requirements, a 3D-modeling and prototyping workflow may look like this:

Step 1: Define the Battery Requirements

The process begins with understanding the product and battery requirements.

These may include:

Voltage
Capacity
Current requirements
Runtime
Battery chemistry
Physical dimensions
Weight restrictions
Operating environment
Connector requirements
Charging requirements
BMS requirements
Regulatory considerations

Mechanical and electrical requirements need to be considered together.

Step 2: Develop the Preliminary Battery Design

Once the requirements are understood, engineers can begin defining the pack architecture.

This may involve selecting cells, determining cell configuration, planning protection electronics or BMS requirements, and establishing preliminary mechanical dimensions.

Emerging Power’s battery project management process progresses through initial review, preliminary design, design and development, and first articles before production approval.

Step 3: Create the 3D CAD Model

The battery enclosure and related mechanical components are then modeled digitally.

The model allows engineers to evaluate component positioning and overall geometry before a physical part is created.

Step 4: Prepare the Model for 3D Printing

The CAD model is converted into a format that can be processed by the selected additive manufacturing system.

The design is digitally divided into layers, and the 3D printer builds the component according to those instructions.

Material and printing-process selection depend on what the prototype is intended to demonstrate.

A prototype designed primarily to verify dimensions may have different requirements from one intended for more extensive mechanical evaluation.

Step 5: Evaluate the Physical Prototype

Once printed, engineers can evaluate characteristics such as:

Overall dimensions
Product fit
Cell positioning
Connector placement
Component clearance
Mounting locations
Assembly sequence
Accessibility

Issues identified during this stage can be documented and returned to the CAD model.

Step 6: Revise and Repeat

If changes are needed, engineers modify the digital design and create another prototype.

This ability to iterate is one of the most important advantages of combining 3D modeling with rapid prototyping.

Instead of treating the first design as final, engineers can progressively refine the product.

Step 7: Move Toward First Articles and Production

Once the design reaches the required level of maturity, the project can advance toward first articles, testing, customer approval, tooling where required, and eventually production.

This structured approach helps connect prototype development with actual manufacturing rather than treating 3D printing as a standalone activity.

Does a 3D Printed Prototype Replace Battery Testing?

No.

A 3D printed prototype is an engineering tool, not proof that a completed battery system satisfies every performance, safety, environmental, or regulatory requirement.

Depending on the application, additional evaluation may include:

Electrical testing
Functional testing
Thermal testing
Mechanical testing
Environmental testing
Battery management system validation
Transportation testing
Regulatory or industry-specific testing

For lithium batteries intended for transportation, relevant products may need to satisfy applicable UN 38.3 safety transportation testing requirements before shipment.

The prototype may help engineers evaluate mechanical design decisions before these later stages, but it should not be treated as a substitute for required design verification or compliance testing.

3D Modeling and Custom Battery Development at Emerging Power

Emerging Power supports OEM battery development with mechanical, electrical, prototyping, testing, and manufacturing capabilities.

Its mechanical engineering capabilities include 3D design for battery enclosures and related components, while its broader custom battery design services support projects from initial technical review through preliminary design, development, first articles, testing, and production.

For OEMs, this means 3D modeling does not have to operate as an isolated design activity.

It can be incorporated into the larger battery development process alongside:

Cell selection
Electrical design
Battery management systems
Enclosure engineering
Prototype development
Testing
Documentation
Manufacturing planning

Learn more about Emerging Power’s 3D printing and prototyping capabilities for custom battery development.

Final Thoughts

The biggest advantage of 3D modeling for 3D printing in battery development is not simply the ability to print a component.

It is the ability to evaluate and improve a design before making larger manufacturing commitments.

A digital model can be turned into a physical prototype, evaluated, modified, and produced again. That gives engineering teams a practical way to investigate fit, packaging, component placement, assembly, and enclosure design while changes are still relatively easy to make.

For OEMs developing custom battery-powered products, integrating 3D modeling and rapid prototyping into the engineering workflow can create a more efficient path from initial concept to a production-ready battery design.

Talk to Emerging Power About Your Battery Project

Need support developing a custom battery pack or prototype?

Emerging Power provides custom battery design, mechanical and electrical engineering, 3D modeling, prototyping, testing support, and manufacturing services for OEM applications.

Request a custom battery design quote to discuss your battery development requirements.

Frequently Asked Questions

What is 3D modeling for 3D printing?

3D modeling for 3D printing is the process of creating a digital three-dimensional CAD model that can be converted into instructions for an additive manufacturing system. The printer then builds the physical component layer by layer.

How is 3D printing used in battery development?

3D printing can be used during battery development to create prototype enclosures, housings, fixtures, and other mechanical components. These prototypes can help engineers evaluate dimensions, fit, component placement, mounting features, and assembly before moving toward production.

Can 3D printing speed up battery prototyping?

Yes. For suitable components, 3D printing allows engineers to produce prototypes directly from digital models without first creating conventional production tooling. This can make it easier to test and revise early-stage designs.

Why use a 3D printed battery enclosure prototype?

A prototype enclosure gives engineers a physical representation of the proposed battery design. It can help reveal issues involving fit, connectors, wiring, mounting points, component clearances, and assembly before the final production process is selected.

Can 3D printing be used for custom battery packs?

3D printing can support custom battery pack development by producing prototype mechanical components and helping engineers evaluate custom geometries. The appropriate printing process and material depend on the design requirements and intended purpose of the prototype.

Does a 3D printed battery prototype replace final testing?

No. A prototype can support design evaluation, but the finished battery may still require electrical, mechanical, thermal, environmental, safety, transportation, and regulatory testing depending on its chemistry, application, and target market.

How Much Does a Custom Battery Pack Cost?

There is no single price for a custom battery pack. Custom battery pack cost depends on the cells, pack configuration, BMS and electronics, enclosure, engineering, tooling,

How Much Does a Custom Battery Pack Cost?

There is no single price for a custom battery pack. Custom battery pack cost depends on the cells, pack configuration, BMS and electronics, enclosure, engineering, tooling, prototypes, testing, certification requirements, and production volume. For OEM projects, it is important to separate one-time development expenses from recurring per-unit production costs.

A simple battery assembly using an established design may require relatively little customization. A battery for a medical device, industrial system, drone, communications product, or defense application may require custom electronics, mechanical engineering, software, testing, and regulatory work.

That is why asking, “How much does a custom battery cost?” without defining the application is a little like asking how much it costs to manufacture a product without having its specifications.

The better question is: What requirements are driving the cost of my battery pack?

How Is a Custom Battery Pack Price Calculated?

A custom battery quote typically combines one-time development costs, recurring unit costs, and applicable testing or certification expenses.

Development expenses can include engineering, BMS or PCB development, mechanical design, prototypes, tooling, and test development. Recurring production expenses typically include battery cells, electronics, enclosure components, connectors, assembly, production testing, and packaging.

Because each application changes these inputs, an accurate custom battery pack price normally requires a project-specific technical review.

Emerging Power’s battery design and production process includes technical review, preliminary design, engineering and development, first articles, customer testing, and production approval.

What Determines Custom Battery Pack Cost?

A custom battery pack is more than a group of cells. Its total cost reflects the electrical, mechanical, safety, performance, and production requirements of the finished system.

Here are the major cost drivers.

1. Cell Chemistry and Cell Selection

Cells are one of the most important recurring costs in a battery pack.

The appropriate chemistry depends on requirements such as energy density, discharge rate, operating temperature, expected cycle life, physical dimensions, and safety.

For applications requiring higher voltage, current, or energy density, Emerging Power develops custom lithium-ion battery packs around the requirements of the end product.

Higher-performance or specialized cells can affect both material costs and engineering requirements, so cell selection should be evaluated as part of the complete system rather than simply by comparing individual cell prices.

2. Battery Capacity, Voltage and Pack Configuration

A battery requiring more energy generally needs more cells or higher-capacity cells, but cost is not determined by capacity alone.

Voltage, peak current, continuous current, series/parallel configuration, runtime, charging requirements, and thermal behavior can all influence the design.

A compact high-discharge pack for a drone, for example, can present different engineering challenges from a battery designed for a lower-power industrial instrument.

Emerging Power’s custom battery pack design checklist explains why requirements such as voltage, capacity, load profile, temperature range, size, and expected product life should be defined early in the development process.

3. BMS and Electronics

For many rechargeable custom packs, the Battery Management System (BMS) is an important part of both safety and cost.

Depending on the application, electronics may need to manage:

Overcharge and over-discharge protection
Overcurrent protection
Temperature monitoring
Cell balancing
State-of-charge information
Communication with the host device
Charging behavior

A basic protection circuit is very different from a sophisticated BMS with communications and custom programming.

Emerging Power’s custom battery design services can include BMS and PCB development, charging circuits, automated testing, and other engineering requirements based on the application.

4. Mechanical Design and Enclosure

The battery must physically fit and operate safely inside the end product.

A project may therefore require a custom enclosure, connectors, wiring, mounting features, insulation, seals, or mechanical protection.

Environmental requirements can increase complexity further. A battery used in a rugged industrial product or UAV may face vibration, temperature, shock, weight, or space constraints that a standard commercial battery does not.

For applications where size, weight, discharge performance, and environmental conditions are particularly important, reviewing the requirements for custom drone and UAV battery packs provides a useful example of how application requirements influence battery design.

Mechanical decisions should therefore be made alongside electrical design rather than after the battery architecture has already been finalized.

5. Engineering and NRE

One of the most misunderstood parts of custom battery pack pricing is non-recurring engineering, or NRE.

NRE covers development work required to create the battery rather than manufacture every production unit.

Depending on the project, this can include electrical engineering, mechanical design, PCB/BMS development, software, documentation, test development, and design revisions.

Emerging Power’s project management process separates considerations such as NRE, tooling, regulatory testing, and battery-pack production pricing during development.

For OEM buyers, these expenses should be evaluated separately from unit price.

6. Prototypes and First Articles

A custom battery generally should not move directly from a drawing into high-volume production.

Prototype and first-article builds allow the manufacturer and OEM to validate:

fit → electrical performance → thermal behavior → charging → communication → integration with the finished product

Emerging Power’s battery development process includes first-article battery packs for customer testing and approval before the project proceeds toward production.

Additional design iterations can increase development cost, but identifying an issue before mass production may prevent significantly more expensive rework later.

7. Testing and Certification

Testing can represent a meaningful portion of the initial project budget.

Requirements depend on the chemistry, application, destination markets, and transportation method.

For lithium cells and batteries, UN 38.3 is an important transportation-testing consideration. The UN Manual of Tests and Criteria contains the relevant lithium cell and battery testing provisions in subsection 38.3. UNECE

OEM teams evaluating lithium battery transportation requirements can consult the UNECE Manual of Tests and Criteria as a primary reference.

Depending on the application, other product-specific safety, transportation, or regulatory requirements may also apply.

Planning these requirements early is important because changing cells, configuration, or other major design elements later can lead to additional validation work.

8. Tooling

Custom mechanical components can require dedicated tooling.

Examples may include molded housings, fixtures, test equipment, and manufacturing aids.

Tooling is generally an upfront expense rather than something that should be interpreted entirely as part of the recurring battery unit cost.

This distinction becomes particularly important when comparing quotations from different battery manufacturers.

9. Production Volume

Volume can significantly affect battery pack manufacturing cost per unit.

Development, tooling, procurement, and manufacturing setup costs can be distributed across more units as production increases. Component purchasing and manufacturing processes may also become more efficient at higher volumes.

However, buyers should not evaluate a supplier solely on the lowest projected high-volume price.

Ask what pricing looks like across:

Prototype → Pilot → Initial Production → Forecast Production Volume

That provides a more realistic picture of total program economics.

One-Time Cost vs. Per-Unit Battery Cost

OEMs can make custom battery quotations easier to compare by separating costs into two categories.

One-Time / Development Costs	Recurring Production Costs
Engineering / NRE	Battery cells
BMS/PCB development	PCB/BMS components
Mechanical design	Enclosure and connectors
Tooling	Wiring and assembly
Prototype development	Production testing
Regulatory testing	Packaging
Test-system development	Manufacturing labor

A quote that appears expensive upfront may have lower production costs, while a low development quote may exclude tooling, certification, or engineering that will eventually be required.

Compare the total project scope, not simply the battery’s unit price.

How Can OEMs Control Custom Battery Pack Costs?

The most effective cost reductions often happen before production.

Start with clear electrical, mechanical, and environmental requirements. Avoid specifying performance the application does not actually need. Consider available cell formats before designing the final enclosure, and identify testing and certification requirements early.

Most importantly, treat the battery as part of the product architecture rather than a component added near the end of product development.

Following a structured custom battery pack design process can help OEM teams define critical requirements before engineering progresses too far.

Emerging Power’s development workflow begins with technical documentation and project requirements before moving into preliminary design, engineering, first articles, testing, and production.

That approach can help reduce unnecessary redesign later.

What Information Is Needed for an Accurate Battery Pack Quote?

If you are requesting custom battery pack pricing, prepare as much of the following information as possible:

Required voltage and capacity
Continuous and peak current
Desired runtime
Maximum dimensions and weight
Rechargeable or primary battery
Operating temperature range
Charging requirements
Connector requirements
Communication requirements
Environmental conditions
Required certifications or testing
Prototype quantity
Expected annual production volume

You do not necessarily need to know the exact cell or BMS architecture. An experienced battery engineering team can help translate product requirements into a practical battery design.

Once these requirements are defined, OEM teams can request a custom battery pack quote based on the actual application rather than relying on a generic per-pack estimate.

Frequently Asked Questions

How much does a custom battery pack cost?

There is no universal price. Custom battery pack cost depends on cell chemistry and quantity, voltage and capacity, BMS complexity, enclosure design, engineering, tooling, prototypes, testing, certification requirements, and production volume. OEMs should request a project-specific quotation rather than rely on a generic price estimate.

Why are custom battery packs more expensive than standard batteries?

A custom battery may require electrical engineering, electronics, mechanical design, prototypes, specialized components, testing, and tooling that an existing standard battery does not require. These development requirements contribute to the total cost of the program.

Does a BMS increase battery pack cost?

Yes. A BMS adds electronics and potentially engineering and software requirements to the battery system. The cost impact depends on functions such as protection, cell balancing, temperature monitoring, communications, state-of-charge reporting, and custom programming.

Does ordering more battery packs reduce the unit cost?

Higher production volumes can sometimes reduce per-unit manufacturing costs because setup and other fixed expenses are distributed across more units, while component procurement and manufacturing may become more efficient. Actual pricing depends on the design, materials, forecast, and production requirements.

What information does a manufacturer need to quote a custom battery?

A battery manufacturer will typically need voltage, capacity, load profile, physical dimensions, operating environment, charging requirements, connectors, communications requirements, required testing or certifications, prototype quantity, and expected production volume.

The Bottom Line

Custom battery pack cost is determined by the complete system, not the cells alone.

Cell chemistry, BMS complexity, enclosure design, engineering, tooling, prototypes, testing, and production volume all contribute to total program cost.

For OEMs, the most useful quotation separates one-time development expenses from recurring production costs and clearly defines the engineering, testing, tooling, and manufacturing services included.

Emerging Power supports OEM battery projects through its custom battery design and development capabilities, from defining technical requirements through development and production.

Need Pricing for a Custom Battery Pack?

Request a custom battery pack quote to discuss voltage, capacity, form factor, operating environment, testing requirements, and anticipated production volume.

Lithium-Ion Battery Supplier vs. Manufacturer: What’s the Difference?

How to Choose the Right Custom Battery Pack Manufacturer

Choosing a custom battery pack manufacturer is an important part of developing a battery-powered product. The battery affects the product’s size, weight, runtime, power output, safety, and operating life. For an OEM, the right manufacturer should do more than assemble cells. The manufacturer should be able to understand the product requirements, select suitable cells, design the electrical and mechanical parts of the pack, develop the battery management system when needed, test the design, and support production. This is especially important when the battery will be used in medical equipment, industrial products, communications equipment, military systems, tracking devices, or other products with specific operating requirements. Recent developments in battery safety and manufacturing also make it important to consider testing, transportation requirements, cell sourcing, and regulatory requirements early in the design process.

What Does a Custom Battery Pack Manufacturer Do?

A custom battery pack manufacturer designs a battery around the requirements of a specific product. A custom battery may need a specific voltage, capacity, current output, physical size, connector, charging system, communication interface, or operating temperature range. The manufacturer may also design the battery management system (BMS), protection circuit, printed circuit board (PCB), enclosure, wiring, and other components. The process usually starts with the OEM’s requirements. The manufacturer then develops a preliminary design, builds prototypes, performs testing, makes design changes when needed, and moves the approved design into production. Emerging Power describes a similar process for its custom battery projects, beginning with an initial technical review and preliminary design and continuing through development, first-article production, customer testing, and production approval.

Why Is Choosing the Right Battery Manufacturer Important?

The battery is part of the product’s overall system. A problem with the battery can affect the performance or reliability of the finished product. For example, the battery needs to provide enough current during normal operation and during short periods of high demand. It also needs to operate within the temperature and environmental conditions expected for the product. The physical design matters as well. A battery that is electrically suitable may not fit the available space or may not provide the required connector or mounting arrangement. This is why OEMs should evaluate the manufacturer’s engineering capabilities, testing process, quality controls, supply chain, and production capacity, rather than comparing suppliers on battery price alone.

7 Factors to Consider When Choosing a Custom Battery Pack Manufacturer

1. Look at the Manufacturer’s Engineering Capabilities

The first question to ask is simple: Can the manufacturer design a battery around our product? A capable custom battery manufacturer should be able to review requirements such as:

Voltage
Capacity
Peak and continuous current
Runtime
Charge requirements
Operating temperature
Physical dimensions
Weight
Connector requirements
Environmental conditions
Expected production quantity
Applicable safety and transportation requirements

The manufacturer should also be able to explain why a particular cell, chemistry, pack configuration, or BMS design is appropriate. Emerging Power currently states that its engineering capabilities include mechanical design, electrical design, protection circuits, fuel gauges, charger-control PCB assemblies, and battery management systems.

Ask Where the Cells Come From

The quality and availability of the cells are important parts of a battery pack project. Ask the manufacturer:

Which cell suppliers do you use?
How are cells qualified?
How are incoming cells inspected?
Can battery components be traced to production lots?
What happens if a cell becomes unavailable?
Can you recommend an alternative cell without redesigning the entire product?

A good manufacturer should be able to discuss cell sourcing openly. Emerging Power states that it maintains relationships with major cell manufacturers, including Panasonic, Samsung, Moli Energy, LG, and Sony. It also lists support for lithium-ion, lithium-polymer, lithium iron phosphate, lithium primary, NiMH, and other battery chemistries. The right chemistry depends on the product. There is no single battery chemistry that is best for every application.

3. Check the BMS and Protection Design

For many rechargeable battery applications, the battery management system is an important part of the pack. A BMS can monitor battery conditions such as voltage, current, and temperature. Depending on the design, it can also manage cell balancing and provide protection against conditions such as overcharge, over-discharge, overcurrent, and short circuits. The exact BMS requirements depend on the chemistry, cell configuration, application, and product design. When evaluating a manufacturer, ask whether it can design or integrate the BMS instead of requiring the OEM to source the battery electronics separately. Emerging Power says its custom battery design services can include BMS, charging circuits, automated testing, and custom software for end-of-line functional testing.

4. Ask About Testing and Safety

Testing should be part of the development process, not something considered after production begins. The appropriate tests depend on the battery and its end application. They may include electrical, mechanical, environmental, temperature, charging, discharge, protection, and production tests. UL Solutions currently lists battery safety standards and testing services including UL 1642, UL 2054, UL 2056, UL 2271, and UL/IEC 62133-1 and 62133-2. The applicable standard depends on the particular battery and product. UL Solutions also notes that battery requirements can vary depending on the finished product and battery construction. For example, UL 1642 generally applies to lithium cells and batteries, while other standards may apply to rechargeable battery packs. This is why a battery manufacturer should be able to identify the standards that apply to your specific product rather than simply saying that a battery is “certified.”

5. Consider Transportation Requirements Early

Transportation requirements should also be discussed during battery development. Lithium batteries are regulated for transportation, and the requirements can affect product testing, packaging, documentation, and shipping. Emerging Power published a June 2026 guide explaining UN 38.3 testing and why transportation compliance should be considered by OEM manufacturers during battery development.UL Solutions also notes that lithium-ion and lithium-metal batteries are regulated as dangerous goods under applicable transportation requirements. If your products will be shipped within the United States or internationally, ask the manufacturer what transportation testing and documentation will be required.

6. Check Quality Systems and Manufacturing Controls

A battery design can be good on paper and still have problems if production controls are weak. Ask potential manufacturers about:

Quality certifications
Production inspection
Cell and component traceability
Automated testing
Engineering change control
First-article inspection
Production documentation
Defect handling
Supplier qualification

Emerging Power currently lists ISO 9001:2015 and AS9100:2016 certification among its capabilities. It also lists manufacturing and assembly facilities in the U.S., Mexico, and Asia. For an OEM, these details matter because the goal is not just to produce one working prototype. The manufacturer needs to produce consistent battery packs over the life of the product.

7. Make Sure the Manufacturer Can Scale With You

A manufacturer may be able to produce prototypes but have limited experience with production quantities. Before selecting a supplier, discuss your expected volumes. For example, ask: Can you support our prototype, pilot production, and long-term production requirements? It is also useful to ask how the manufacturer handles changes in demand, component shortages, cell availability, and product revisions. Emerging Power describes a development process that moves from technical review and preliminary design to development, first articles, customer approval, and production. Having one manufacturer involved across these stages can make the transition from prototype to production easier.

Why Working With an Experienced Partner Matters

Custom battery pack design touches electrical engineering, mechanical design, manufacturing, and regulatory compliance all at once. OEMs that partner with an experienced custom battery pack manufacturer benefit from:

Fewer design revisions and delays
Faster path to certification
Reduced risk of field failures
A single point of accountability across the entire process

Custom Battery Pack vs. Standard Battery Pack

A standard battery may be a good choice when your product can use an existing size, voltage, capacity, and connector. A custom battery makes more sense when the product has requirements that standard batteries cannot meet. For example, customization may be useful when you need a battery that:

Fits a specific enclosure
Provides a specific voltage or capacity
Handles a particular current load
Uses a specific connector
Works in a defined temperature range
Includes a BMS
Communicates with the host product
Meets application-specific testing requirements

The decision should be based on the product requirements rather than the assumption that a custom battery is always better.

Frequently Asked Questions

What is a custom battery pack manufacturer?

A custom battery pack manufacturer designs and produces battery packs for a specific product or application. The work can include cell selection, electrical and mechanical design, BMS integration, prototyping, testing, compliance support, and production.

How do I choose a custom battery pack manufacturer?

Look for a manufacturer with relevant engineering experience, reliable cell sourcing, BMS capabilities, testing procedures, quality controls, regulatory knowledge, and the ability to support both prototypes and production.

What information is needed for a custom battery pack?

Manufacturers generally need the required voltage, capacity, current, runtime, dimensions, weight, connectors, operating temperature, charging method, environmental conditions, production quantity, and applicable compliance requirements.

Does every custom battery pack need a BMS?

No. The need for a BMS depends on the battery chemistry, configuration, and application. Many rechargeable lithium battery systems require battery management and protection functions, but the specific design must be determined from the product requirements.

What battery chemistry should I choose?

There is no universal answer. Lithium-ion, lithium-polymer, lithium iron phosphate, lithium primary, NiMH, and other chemistries have different characteristics. The right choice depends on energy, power, temperature, cycle life, size, weight, safety, and cost requirements.

What certifications does a custom battery pack need?

The requirements depend on the battery and the finished product. Applicable standards may include UL, IEC, transportation testing such as UN 38.3, or other industry-specific requirements. Your manufacturer should identify the requirements for your application.

Can a battery manufacturer make prototypes and production quantities?

Many OEM battery manufacturers support both stages. Before choosing one, confirm that the manufacturer has the engineering, production capacity, testing, and supply-chain resources needed for your expected volume.

Final Thoughts

Before choosing a custom battery pack manufacturer, make sure the company can provide:

Battery engineering
Appropriate cell selection
BMS and protection design
Mechanical and electrical design
Prototype development
Battery testing
Regulatory support
Production quality controls
Component traceability
Production capacity
Supply-chain support
Long-term engineering support

The right manufacturer should be able to explain how it will take your battery requirements from the initial design through testing and production.

Talk to Emerging Power About Your Battery Project

If you need a custom battery pack for an OEM product, Emerging Power can review your requirements and discuss the available design and manufacturing options. Phone: (201) 441-3590 Email: sales@emergingpower.com Emerging Power 200 Holt Street Hackensack, NJ 07601 You can also review the company’s current custom battery design services and submit a request for a quote.

Custom Battery Pack Design Checklist: From BMS to Enclosure to Certification

Designing a custom battery pack involves far more decisions than most OEM teams expect at the start of a project:

Cell selection, electronics, mechanical design, and compliance all have to work together.

Whether it is a medical device, an industrial sensor, or a defense platform, missing even one step in the design process can delay a launch or create a safety issue down the line. Most engineering teams benefit from a clear, structured checklist before committing to a design. As custom power requirements grow more complex in 2025 and 2026, having a repeatable process has become essential for OEMs building battery-powered products. The full process comes down to:

Cell selection, BMS design, mechanical engineering, and certification, working together as one system.

Step 1: Define the Application Requirements

Before any design work begins, the pack’s real-world requirements need to be locked in, including:

Voltage and capacity needed
Physical size and weight constraints
Expected discharge rate and load profile
Operating temperature range
Expected cycle life and product lifespan

Skipping this step is the most common reason custom battery projects run into rework later.

Step 2: Select the Right Cell Chemistry

Different chemistries offer different tradeoffs in energy density, safety, and cost. Common options include:

Lithium-ion for high energy density
Lithium polymer (LiPo) for lightweight, flexible form factors
Lithium iron phosphate (LFP) for enhanced safety and longevity
Lithium primary or lithium-thionyl chloride cells for long shelf life, non-rechargeable applications
Nickel metal hydride or sealed lead acid for legacy or cost-sensitive designs

The right choice depends entirely on the application’s power, weight, and safety requirements.

Step 3: Design the Battery Management System

A properly engineered BMS is what keeps a custom pack safe and reliable throughout its lifespan. Key BMS design considerations include:

Voltage monitoring and cell balancing
Overcharge and overdischarge protection
Thermal monitoring and current regulation
Communication protocols with the host device
Data logging for diagnostics and warranty support

Step 4: Engineer the Mechanical Enclosure

The enclosure protects the cells and electronics while fitting the constraints of the final product. Enclosure design should account for:

Available space within the host device
Vibration, shock, and drop resistance
Thermal dissipation and airflow
Connector placement and cable routing
Ingress protection for dust or moisture exposure

Step 5: Plan for Manufacturing and Assembly

A design that looks good on paper still needs to be manufacturable at scale. This step should confirm:

Ultrasonic welding or other assembly methods needed
3D printing capabilities for prototyping enclosures
Automated testing and programming during production
Consistent quality control across production batches

Step 6: Build In Regulatory and Safety Compliance

Certification requirements should be considered early, not added at the end of the project. Common requirements include:

UN38.3 transportation safety testing
ITAR compliance for defense-related applications
AS9100 quality standards for aerospace projects
IEC and UL safety certifications where applicable

Step 7: Test, Validate, and Iterate

Before finalizing a design, packs should go through rigorous testing, including:

Test Type	What It Confirms
Thermal cycling	Performance across temperature extremes
Vibration and shock testing	Durability in real-world conditions
Charge and discharge cycling	Long-term capacity retention
UN38.3 transportation testing	Safety for shipping and logistics
BMS functional testing	Accurate protection and monitoring behavior

Step 8: Plan for Charging Compatibility

A custom battery pack is only as reliable as the charger paired with it. This step should confirm:

Charging profile matches the pack’s chemistry and BMS
Charger communicates properly with the BMS if required
Charging time meets product expectations
Certification alignment between the charger and the pack

Step 9: Plan for Scalability and Future Revisions

A custom battery pack rarely stays static after launch. Products evolve, regulations change, and supply chains shift. Building flexibility into the design from the start helps avoid costly redesigns later, including:

Selecting cell suppliers with reliable long-term availability
Designing the BMS with firmware that can be updated as requirements change
Leaving margin in the enclosure for future capacity or feature additions
Documenting the full design so future revisions do not require starting from scratch

Common Pitfalls in Custom Battery Pack Design

Even well-resourced engineering teams run into avoidable problems during custom battery pack development. Common pitfalls include:

Finalizing the mechanical enclosure before the BMS and cell configuration are confirmed
Underestimating the time required for UN38.3 and other certification testing
Choosing a cell chemistry based on cost alone, without validating it against the real load profile
Failing to test the pack under the same conditions it will face in the field, including temperature extremes and vibration
Treating the charger as a separate project instead of part of the same design process
Skipping documentation, which slows down troubleshooting and future revisions

Cost Considerations Throughout the Design Process

Cost decisions made early in a custom battery pack project often have the biggest long-term impact. Teams should weigh:

Cell cost versus performance and lifespan tradeoffs
BMS complexity versus the level of protection and monitoring actually needed
Enclosure material and manufacturing method versus durability requirements
Certification costs versus the markets the product will actually ship to
Prototype iteration costs versus the risk of design changes after production begins

Balancing these factors early helps avoid both overspending on unnecessary features and underspending in ways that create risk later.

Working With Cross-Functional Teams

Custom battery pack design touches multiple disciplines at once, and the strongest results come from close collaboration between:

Electrical engineers responsible for cell selection and BMS design
Mechanical engineers responsible for enclosure and thermal management
Compliance specialists managing certification requirements
Manufacturing teams confirming the design can be produced reliably at scale
Product managers aligning the design with cost, timeline, and market requirements

Projects that treat these disciplines as separate, sequential steps tend to experience more delays than projects that involve all stakeholders from the earliest planning stages.

How Requirements Gathering Shapes the Entire Project

The requirements phase often gets rushed because it does not involve visible design work, but it has the biggest impact on how smoothly the rest of the project goes. A thorough requirements phase should also capture:

Regulatory markets the product will ship to, since this affects certification scope from day one
Environmental exposure, including humidity, dust, and altitude if relevant to the application
Expected storage conditions between manufacturing and end use
Serviceability requirements, such as whether the pack needs to be field replaceable
Budget targets for both prototype and production volumes

Teams that document these requirements in writing before design work begins tend to move through later stages with far fewer surprises.

Choosing Between Standard and Custom Cell Configurations

Once chemistry is selected, OEMs also need to decide between standard cell counts and configurations versus a fully custom arrangement. This decision affects cost, lead time, and flexibility:

Standard series and parallel configurations are often faster to source and lower cost, since they use widely available cell counts
Custom configurations allow for tighter optimization of voltage, capacity, and physical footprint, but may extend lead times
Hybrid approaches, using standard cells in a custom arrangement, often provide the best balance of cost and performance for mid-volume products

How to Choose a Partner for Custom Battery Pack Design

Following this checklist internally is useful, but most OEMs still rely on an experienced manufacturing partner to execute it. When evaluating a potential partner, look for evidence that they can support the full process, not just one piece of it:

A track record of designing packs across multiple chemistries and applications
In-house BMS engineering rather than relying on a generic, off-the-shelf module
Established relationships with testing labs for UN38.3 and other required certifications
Willingness to share documentation, test data, and facility information during the vetting process
Clear communication about timelines at each stage, from prototype to production

A partner who can speak confidently to every step of this checklist, rather than just cell sourcing or assembly, is far more likely to deliver a pack that performs reliably and meets certification requirements on schedule.

A Quick Reference Checklist

Application requirements defined
Cell chemistry selected
BMS designed and integrated
Enclosure engineered for size, thermal, and durability needs
Manufacturing process confirmed
Certification path identified early
Full testing and validation completed
Charger compatibility confirmed

Why Working With an Experienced Partner Matters

Fewer design revisions and delays
Faster path to certification
Reduced risk of field failures
A single point of accountability across the entire process

Industries That Rely on Custom Battery Pack Design

Medical Devices

Patient safety depends on precise, validated, and certified battery performance.

Drones and UAVs

Weight, thermal, and BMS tuning directly affect flight time and reliability.

Defense and Military

Mission-critical equipment requires rugged design and strict compliance.

Industrial IoT

Long field deployments demand consistent, long-lasting battery performance.

FAQs

How long does custom battery pack design typically take?

Timelines vary by complexity, but most custom projects move through requirements, design, prototyping, and certification over several months.

Do I need to choose a BMS before designing the enclosure?

Yes. BMS placement and thermal behavior directly affect enclosure size and design, so these steps should happen together.

What certification is required for shipping lithium battery packs?

Most lithium battery packs require UN38.3 transportation safety testing before they can be shipped by air or sea.

Can an existing off-the-shelf pack be customized instead of designed from scratch?

In some cases, yes, but applications with unique size, safety, or performance requirements usually benefit from a fully custom design.

Who should be involved in the battery pack design process?

Electrical engineers, mechanical designers, and compliance specialists should all be involved from the early requirements stage through final testing.

What is the biggest cause of delays in custom battery pack projects?

Finalizing the enclosure or certification plan before the BMS and cell configuration are locked in is one of the most common causes of costly, time-consuming redesigns.

How much prototyping should be expected before production?

Most custom projects go through multiple prototype iterations to validate performance, thermal behavior, and certification requirements before committing to full production.

Does the checklist change for non-rechargeable battery packs?

Some steps, such as BMS design, may be simplified or unnecessary for non-rechargeable packs, but cell selection, enclosure design, and certification remain essential.

How often should a custom battery pack design be revisited after launch?

Design reviews are recommended whenever cell suppliers, regulations, or product requirements change, even if the pack has already passed certification.

Final Thoughts

A successful custom battery pack design depends on treating cell selection, BMS design, enclosure engineering, and certification as one connected process rather than separate steps. OEMs that follow a structured checklist reduce risk, avoid costly rework, and bring safer, more reliable products to market.

How Charger Form Factor Affects Product Design

Explore Emerging Power’s custom battery design services or learn more about our compliance and regulatory capabilities to build a pack that meets every requirement from day one.

Why Lithium-Ion Battery Packs Overheat in Industrial Equipment

Industrial equipment is becoming smarter, faster, and more power-intensive. From automated manufacturing systems and robotics to UAVs, IoT sensors, and medical devices, lithium-ion battery packs are now the backbone of modern industrial operations.

But there is one growing concern that manufacturers, OEMs, and engineering teams cannot ignore:

Battery overheating.

In 2025, lithium-ion battery incidents continue to rise globally. A recent business safety study found that 54% of businesses experienced lithium-ion battery-related incidents, including overheating, smoking, or fire events. (aviva.com)

For industrial applications, overheating is more than a maintenance issue. It can lead to:

Equipment shutdowns
Reduced battery lifespan
Thermal runaway
Compliance failures
Safety hazards
Expensive downtime

This is why OEM manufacturers increasingly rely on custom-engineered battery solutions from companies like Emerging Power to improve thermal stability, safety, and long-term performance.

Why Lithium-Ion Battery Packs Overheat

Lithium-ion batteries naturally generate heat during charging and discharging. However, industrial environments create extreme operating conditions that accelerate temperature buildup.

The Most Common Causes of Battery Overheating

1. High Discharge Loads

Industrial equipment often demands continuous high-current output. Heavy machinery, robotics, UAV systems, and industrial sensors place intense stress on battery cells.

When the discharge rate exceeds the battery pack’s thermal handling capability, internal temperatures rise rapidly.

2. Poor Thermal Management

Many off-the-shelf battery packs lack advanced cooling systems or airflow optimization.

Without proper heat dissipation:

Internal hotspots form
Cell imbalance increases
Performance degrades faster

Research published in 2025 found that optimized thermal management systems significantly reduced maximum battery temperatures and improved temperature uniformity. (arXiv)

Industrial Environments Make the Problem Worse

Industrial applications expose batteries to conditions far beyond consumer electronics.

Industrial Condition	Impact on Battery
High ambient temperatures	Faster thermal buildup
Continuous operation	Increased heat generation
Dust and contaminants	Reduced cooling efficiency
Vibration and shock	Internal cell damage
Fast charging cycles	Thermal stress
Enclosed equipment spaces	Limited airflow

This is especially critical in:

Manufacturing automation
Medical devices
Military equipment
Drones and UAVs
Asset tracking systems
IoT devices

Emerging Power’s industrial battery solutions are specifically engineered to address these demanding environments with advanced battery management systems, custom enclosure design, and thermal safety integration.

What Is Thermal Runaway?

Thermal runaway occurs when heat generation inside a lithium-ion battery exceeds its ability to dissipate heat.

Once this chain reaction begins:

Internal temperatures rise uncontrollably
Electrolytes begin decomposing
Flammable gases form
Cells may ignite or explode

Recent fire safety reports show lithium-ion battery fires are becoming one of the fastest-growing industrial safety risks globally. (The Guardian)

Warning Signs Your Battery Pack Is Overheating

Industrial operators should monitor for:

Excessive surface heat
Swelling battery packs
Burning odors
Sudden capacity drops
Slow charging performance
Unexpected shutdowns
Voltage irregularities

Ignoring these signs can lead to catastrophic equipment failure.

How Custom Battery Engineering Prevents Overheating

One of the biggest mistakes OEM manufacturers make is using standard battery packs for complex industrial applications.

Industrial systems require custom battery engineering based on:

Load profiles
Operating temperature
Duty cycles
Environmental exposure
Safety requirements

This is where Emerging Power differentiates itself.

With over 120 years of combined engineering experience, the company develops custom battery pack solutions for:

Medical applications
Military systems
IoT devices
Smart meters
UAVs
Industrial OEM equipment (emergingpower)

Key Solutions That Reduce Battery Overheating

Advanced Battery Management Systems (BMS)

A smart BMS monitors:

Temperature
Voltage
Current flow
Cell balancing

This prevents unsafe thermal conditions before they escalate.

Thermal Management Design

Modern battery packs now integrate:

Air cooling systems
Heat sinks
Thermal interface materials
Phase change materials (PCM)

Studies published in 2025 show PCM-based cooling systems can significantly reduce battery temperatures under heavy operating loads. (arXiv)

High-Quality Cell Selection

Cheap or low-quality lithium-ion cells are more prone to:

Internal short circuits
Heat buildup
Premature degradation

Emerging Power uses high-quality cells from trusted global manufacturers for safer long-term operation. (emergingpower)

Why OEMs Are Moving Toward Custom Battery Packs in 2026

Industrial systems are becoming more compact and energy-dense.

That means:

Higher power demand
Less airflow
More thermal risk

As a result, OEMs are shifting toward:

Custom lithium battery packs
Intelligent BMS integration
Ruggedized battery enclosures
Application-specific thermal design

The goal is not just longer runtime.

It is operational reliability and safety.

Battery Overheating Prevention Checklist

Best Practices for Industrial Equipment

Do:

Use certified battery packs
Monitor operating temperatures
Implement thermal management systems
Use smart charging protocols
Perform regular battery inspections
Choose application-specific battery designs

Avoid:

Overcharging
Poor ventilation
Low-quality chargers
Generic battery replacements
Excessive fast charging
Ignoring swelling or heat buildup

FAQs

Why do lithium-ion batteries overheat in industrial equipment?

Industrial systems create high electrical loads, elevated temperatures, and continuous operation cycles that generate excess heat inside battery cells.

What causes thermal runaway in lithium-ion batteries?

Thermal runaway typically occurs due to overheating, internal short circuits, overcharging, or poor thermal management.

Are custom battery packs safer than standard battery packs?

Yes. Custom battery packs are engineered specifically for the equipment’s power demands, environmental conditions, and safety requirements.

How does a Battery Management System help?

A BMS monitors voltage, temperature, and current to prevent unsafe operating conditions and improve battery lifespan.

Which industries are most affected by battery overheating?

Industries using high-performance portable equipment such as manufacturing, medical, defense, IoT, robotics, and UAV systems face the highest overheating risks.

Final Thoughts

Battery overheating is no longer just a technical issue. It is a major operational and safety concern for industrial OEMs in 2025 and beyond.

As industrial systems become more power-dense, manufacturers need battery solutions engineered for:

safety
thermal stability
durability
regulatory compliance
long-term performance

Emerging Power provides custom lithium-ion battery pack solutions designed specifically for demanding industrial applications, helping OEMs reduce thermal risk while improving reliability and performance.

Looking for a Custom Industrial Battery Solution?

Explore Emerging Power’s custom battery design services to build safer, more reliable battery systems for your industrial equipment.

Lithium Iron Phosphate Battery Pack Manufacturers and How to Choose One

Lithium iron phosphate batteries, often called LFP or LiFePO4 batteries, are becoming one of the most widely used energy storage technologies in the world. These batteries are known for their safety, long lifespan, and reliability, which makes them a preferred choice for electric vehicles, renewable energy storage, and industrial equipment.

As demand grows, businesses and engineers are paying closer attention to lithium iron phosphate battery manufacturers and how to choose the right partner for long-term performance and system reliability.

This guide explains how LFP batteries work, why manufacturers matter, and what current market data tells us about where this technology is headed.

What Is a Lithium Iron Phosphate Battery

A lithium iron phosphate battery is a type of lithium-ion battery that uses iron phosphate as the cathode material. This chemistry is more stable than other lithium-based batteries and significantly reduces the risk of overheating or fire.

Because of this stability, LFP batteries are commonly used in applications where safety, durability, and consistent power delivery are more important than maximum energy density.

Why Lithium Iron Phosphate Batteries Are Gaining Market Share

The global shift toward electrification and renewable energy has accelerated the adoption of LFP batteries.

According to Precedence Research, the global lithium iron phosphate battery market is expected to reach approximately 19.6 billion US dollars in 2025 and grow to more than 72 billion US dollars by 2034.
A separate report from SNS Insider estimates the market could grow to over 168 billion US dollars by 2033 as electric vehicle and energy storage adoption increases worldwide.

These numbers show that LFP technology is no longer an alternative option. It is becoming a standard solution across multiple industries.

Why the Manufacturer Matters More Than the Battery Chemistry

Not all lithium iron phosphate battery manufacturers deliver the same results. The performance and safety of an LFP battery depend heavily on how it is designed, assembled, and managed.

A reliable manufacturer focuses on consistent cell quality, proper thermal management, and a well-engineered battery management system. These factors directly affect battery life, safety, and efficiency.

Manufacturers with custom design capabilities can also tailor battery packs to exact voltage, capacity, and physical requirements instead of forcing applications to fit standard modules.

What to Look for in Lithium Iron Phosphate Battery Manufacturers

When evaluating manufacturers, several factors matter more than price alone.

Experience in custom battery pack design is essential, especially for industrial, medical, or energy storage systems.

Compliance with global safety and quality standards ensures batteries can be deployed across markets without regulatory issues.

Scalable production capabilities help support both pilot projects and long-term growth.

Strong technical support and documentation improve system integration and long term reliability.

The Role of Custom LFP Battery Packs

Many applications cannot rely on off-the-shelf batteries. Custom lithium iron phosphate battery packs allow engineers to match the battery exactly to the system requirements.

Custom designs support specific voltage ranges, space constraints, operating temperatures, and safety requirements. They also allow integration of advanced battery management systems that monitor performance and protect against faults.

This approach is especially important in energy storage systems, electric vehicles, and industrial equipment, where reliability directly affects uptime and cost.

Emerging Power designs custom lithium iron phosphate battery packs that focus on safety, performance, and application-specific requirements.
More details are available here

Where Lithium Iron Phosphate Batteries Are Being Used Today

LFP batteries are widely used in electric vehicles because they offer long cycle life and reduced fire risk.

They are a common choice for solar and renewable energy storage systems where daily charge and discharge cycles demand durability.

Industrial equipment such as forklifts and automated machinery, relies on LFP batteries for consistent output and low maintenance.

Backup power and UPS systems use LFP batteries for stable performance during outages.

Real World Industry Adoption

Reuters reported that CATL introduced advanced LFP batteries capable of supporting electric vehicle ranges exceeding 1,000 kilometers, highlighting continued innovation in this chemistry.
Source

China has also seen LFP batteries represent more than half of EV battery installations in recent years, largely due to safety, cost stability, and supply chain advantages.

These trends show why experienced lithium iron phosphate battery manufacturers are playing a critical role in global electrification.

Frequently Asked Questions About Lithium Iron Phosphate Batteries

How long do lithium iron phosphate batteries last?
Most LFP batteries can exceed 3,000 to 5,000 charge cycles, depending on design and usage conditions.

Are LFP batteries safer than other lithium batteries?
Yes. LFP chemistry is more thermally stable and significantly reduces the risk of thermal runaway.

Can lithium iron phosphate battery packs be customized?
Yes. Many manufacturers offer custom battery pack designs based on voltage, capacity, form factor, and application needs.

Final Thoughts

The rapid growth of electric vehicles, renewable energy, and industrial electrification is driving demand for reliable lithium iron phosphate battery manufacturers. Market data clearly shows that LFP batteries are becoming a long-term solution rather than a temporary trend.

Choosing the right manufacturer means better safety, longer service life, and systems that perform as intended over time.

If you are looking for a custom lithium iron phosphate battery pack designed for your specific application, Emerging Power can help.

Explore custom LFP battery solutions and speak with their engineering team here:
📞 Phone: (201) 441-3590
📧 Email: sales@emergingpower.com

How Custom Battery Packs Improve Product Performance

Introduction

In today’s fast‑moving world of portable electronics, industrial systems, medical devices, and IoT equipment, standard off‑the‑shelf batteries often aren’t enough. Performance demands in size, weight, discharge/charge profile, safety, and lifecycle are rising. That’s where custom battery packs come into play. By tailoring every aspect of the power source to the device and application, you unlock higher performance, longer life, and a competitive edge.

At Emerging Power, we specialise in custom‑designed battery packs combining advanced chemistries (like lithium‑ion and Li‑polymer), integrated management systems (BMS), and full regulatory testing to bring your product to market faster and stronger.

In this article, we’ll explore why custom battery packs improve product performance and how Emerging Power delivers that difference.

Why Standard Battery Packs Fall Short

Off‑the‑shelf batteries are convenient and cost‑effective for many use‑cases, but they come with trade‑offs:

Limited flexibility in form factor: standard shapes may force compromise in device design, adding bulk or weight.
Sub‑optimal energy or power density for the exact application: you might oversize “just in case”, or undersize and suffer short runtime.
Generic safety, thermal, and charge/discharge profiles: high‑performance devices often need more stringent requirements.
Longer time to certification or ruggedisation when the pack wasn’t designed specifically for the product environment (e.g., medical, military, outdoor).

3. How Custom Battery Packs Drive Better Performance

Here are the key advantages of a custom battery pack design in improving your product’s performance:

Tailored Form‑Factor & Weight – When a battery pack is designed specifically for your product, you can optimise size, shape, weight distribution, and integration. This helps devices become slimmer, lighter, or more ergonomically designed, improving user experience, portability, and aesthetics.
Optimised Energy & Power Profile – Custom design allows you to match capacity (how much energy) and power (how fast you can deliver energy) exactly to the application’s load profile. For example, a device with bursts of high power but a light standby load benefits from a pack engineered for high discharge rather than just high capacity.
Emerging Power emphasises working with “leading name‑brand cell manufacturers … to provide you with the best possible battery pack solution for your most demanding battery requirements.”
Integrated Battery Management (BMS) & Safety – A custom pack can include a tailored BMS that monitors voltage, current, temperature, cell balancing, and protects against over‑charge, over‑discharge, short circuit, and thermal runaway. That means better safety, longer cycle life, and fewer failures.
Emerging Power mentions on its main site: “We offer design support for the total battery pack requiring a BMS, a PCB, Enclosure, Testing, Regulatory Support, Custom Programming” for even military applications.
Thermal Management & Environmental Robustness – High performance means higher demands on heat dissipation, durability, extreme temperature resistance, vibration, etc. When a pack is built custom, you can design the enclosure, connectors, cooling, or thermal shielding appropriately, delivering reliable performance even in harsh conditions.
Reduced Time to Market & Competitive Advantage Because custom battery packs align to your exact specifications, you avoid the “one size fits all” compromise. That means faster design cycles, fewer iterations, better fit with device architecture, and stronger differentiation in the marketplace.
Lifecycle Optimisation & Total Cost‑of‑Ownership – While custom packs may cost more upfront than generic ones, the overall lifetime value is higher: better cycle life, fewer replacements, fewer failures, and less maintenance downtime. For applications like medical devices, industrial sensors, drones, or military gear, that matters.

4. Use Cases: Where Custom Packs Make a Big Difference

Here are some real‑world scenarios where the value of custom battery packs is evident:

Medical devices: critical equipment cannot tolerate abrupt power dropouts or pack failures. Custom packs ensure reliability, compliance, and long life.
For example, see our article on how lithium‑ion battery suppliers support the medical industry: Unlocking the Power: Lithium‑Ion Battery Suppliers and Custom Packs in the Medical Industry
Drones / UAVs: light‑weight, high‑power bursts and long flight time demand battery packs optimised for weight, discharge rate, cooling, and form‑factor.
IoT & smart sensors: devices often deployed remotely, in harsh environments, with long operating lifetimes and minimal maintenance. Custom packs can match shape, connector, and power profile to deployment.
Industrial instrumentation / rugged environments: in mining, oil & gas, outdoor sensor networks — battery packs must survive extreme temperatures, vibration, and deliver predictable performance.
Consumer / portable electronics: if your product differentiates by design (slim form, high runtime, fast recharge), then the battery pack becomes a key enabler.

5. Why Choose Emerging Power for Custom Battery Packs

Here’s why you should consider Emerging Power for your next battery‑pack design:

Depth of experience: more than 20 years designing and assembling custom battery packs for OEMs across markets, with ISO 9001:2015 and AS9100:2016 certification.
Chemistry flexibility: the ability to work with multiple chemistries (Li‑ion, Li‑polymer, LiFePO₄, NiMH, etc.) and select the ideal one for your product.
High‑quality supply chain: strong relationships with tier‑one cell manufacturers such as Panasonic, Samsung, LG, and Sony.
Full design‑to‑production support: from cell selection, BMS, enclosure design, thermal & mechanical engineering, to regulatory testing and manufacturing.
Market‑specific expertise: whether medical, industrial, military, IoT, or consumer, Emerging Power understands the unique regulatory and performance demands in each.
Focus on performance and safety: The company emphasises “Design for Safety – Built with Quality”.

Best Practices When Specifying a Custom Battery Pack

When you engage with a partner like Emerging Power, consider these best practices to get the most from your custom battery pack:

Start early in the device design process — involve the battery pack engineer while product architecture is still flexible. (Emerging’s site: “the earlier we are brought into the design process, the better.”)
Define your load profile accurately — know your discharge/charge cycles, peak power bursts, standby, ambient conditions, and lifetime expectations.
Choose the right chemistry and cell configuration — balance capacity vs power vs cost vs safety vs temperature.
Specify environmental and mechanical constraints — size, form‑factor, connector type, vibration, shock, thermal cycling.
Establish BMS and safety requirements — cell balancing, thermal cut‑off, over‑charge/over‑discharge protection, redundancy if needed.
Plan for certification and regulatory compliance — medical, military, and consumer all have different rules.
Evaluate lifecycle and serviceability — can the pack be replaced, monitored, serviced?
Communicate with your battery partner — a good partner will guide you on trade‑offs, costs, manufacturability, and sourcing risks.

7. Conclusion

In summary: If you want your product to deliver higher performance, longer runtime, lighter weight, greater reliability, and faster time to market, then a custom battery pack designed specifically for your application is the logical choice. At Emerging Power, we bring the expertise, supply chain, engineering support, and manufacturing capability to make that happen.

By choosing a custom pack built by Emerging Power, you gain more than a battery; you gain a performance enabler. From the smallest sensor to the most demanding medical device, the right power solution makes the difference.

Improve your product performance with a custom battery pack
📞 Call us: (908) 546-5403
📧 Email: sales@emergingpower.com

Or visit our product pages to learn more:

Evaluation Area	What to Verify
Cell sourcing	Cell manufacturer, approved sourcing channels, lot traceability
Engineering	Electrical, mechanical, BMS, charger and integration capabilities
Quality	Quality system, incoming inspection, production controls, final testing
Compliance	Applicable UN 38.3 documentation and product-specific certification support
Manufacturing	Facility capabilities, production controls and scalability
Supply chain	Lead times, component availability and continuity planning
Change control	Process for component, cell and design changes
Support	Engineering access and post-production technical support

High-Performance Batteries Explained: Energy Density vs. Power Density

What Is a High-Performance Battery?

What Is Battery Energy Density?

Why Does High Energy Density Matter?

What Is Battery Power Density?

Why Does High Power Density Matter?

Energy Density vs. Power Density: What Is the Difference?

High Energy Battery vs. High Power Battery

Can a Battery Have Both High Energy and High Power Density?

Why Cell-Level Specifications Are Not Enough

How Battery Management Affects High Performance Applications

Temperature Matters Too

How Should OEMs Choose Between Energy and Power?

Energy Density and Power Density Are Only Part of Battery Performance

Frequently Asked Questions

What is energy density in a battery?

What is power density in a battery?

Is higher energy density always better?

What is the difference between energy density and battery capacity?

Does higher power density mean longer battery life?

Which battery chemistry is best for high performance applications?

Build the Battery Around the Application

Top 5 Questions to Ask Li-Ion Battery Suppliers Before Signing a Contract

Quick Answer: What Should You Ask a Li-Ion Battery Supplier?

1. Where Do You Source Your Lithium-Ion Cells, and Are They Traceable?

Why This Question Matters

2. What Quality Controls and Testing Do You Perform?

Look Beyond the Certificate

3. Which Safety, Regulatory, and Transportation Requirements Will Our Battery Need to Meet?

Why UN 38.3 Documentation Deserves Attention

4. Can You Engineer and Customize the Battery Pack for Our Application?

Ask About the Prototype-to-Production Process

5. How Will You Protect Our Production Schedule and Long-Term Supply?

Do Not Evaluate Lead Time in Isolation

Li-Ion Battery Supplier Evaluation Checklist

Red Flags to Watch for When Comparing Li-Ion Battery Suppliers

Supplier vs. Manufacturer: Know Who You Are Contracting With

Frequently Asked Questions

What should I look for in a Li-ion battery supplier?

What certifications should a lithium-ion battery supplier have?

What is UN 38.3 testing for lithium batteries?

Should I ask my battery supplier for a UN 38.3 test summary?

Should I choose the lowest-priced Li-ion battery supplier?

When should an OEM involve a battery supplier in product development?

Final Thoughts

Looking for a Li-Ion Battery Partner for Your Next OEM Project?

3D Modeling for 3D Printing in Battery Development

What Is 3D Modeling for 3D Printing?

Why Is 3D Modeling Important in Battery Development?

How Does 3D Modeling Speed Up Battery Development?

1. It Brings Mechanical Design Into the Process Earlier

2. Engineers Can Move From CAD to a Physical Prototype Faster

3. Physical Fit Can Be Checked Before Production

4. Complex Battery Enclosures Can Be Evaluated More Efficiently

5. Design Changes Can Be Tested Before Tooling

6. 3D Models Improve Communication Between Engineering Teams

From 3D Model to Battery Prototype: A Typical Development Process

Step 1: Define the Battery Requirements

Step 2: Develop the Preliminary Battery Design

Step 3: Create the 3D CAD Model

Step 4: Prepare the Model for 3D Printing

Step 5: Evaluate the Physical Prototype

Step 6: Revise and Repeat

Step 7: Move Toward First Articles and Production

Does a 3D Printed Prototype Replace Battery Testing?

3D Modeling and Custom Battery Development at Emerging Power

Final Thoughts

Talk to Emerging Power About Your Battery Project

Frequently Asked Questions

What is 3D modeling for 3D printing?

How is 3D printing used in battery development?

Can 3D printing speed up battery prototyping?

Why use a 3D printed battery enclosure prototype?

Can 3D printing be used for custom battery packs?

Does a 3D printed battery prototype replace final testing?

How Much Does a Custom Battery Pack Cost?

How Is a Custom Battery Pack Price Calculated?

What Determines Custom Battery Pack Cost?

1. Cell Chemistry and Cell Selection

2. Battery Capacity, Voltage and Pack Configuration