Shenzhen Shangguo Technology Co., Ltd. is a leading high-tech enterprise specializing in the research, development, and manufacturing of high-quality replacement batteries for laptops,cameras, medical, industrial, specialty equipment, robot, outdoor energy, and other electronic devices!
Li-Ion vs Li-Polymer vs Ni-MH: Which Battery Is Right for Your Device?
Compare Li-Ion, Li-Polymer and Ni-MH rechargeable batteries and learn how to select the right chemistry for your custom battery pack.
Battery chemistry is one of the first decisions to make when developing a custom battery pack. Li-Ion, Li-Polymer and Ni-MH batteries all provide rechargeable power, but they have different characteristics in terms of energy density, voltage, size, weight, shape flexibility and application requirements.
The right choice depends on your device design, required runtime, available installation space, voltage, capacity, weight requirements and operating environment. A battery manufacturer can also help evaluate the cell configuration, connector, protection system and mechanical design before prototype development.
Li-Ion batteries are widely used in portable and professional equipment because they provide high energy density and relatively low weight. They are commonly used in industrial equipment, electronic devices, test instruments, outdoor equipment and portable power systems.
Li-Polymer batteries use a polymer-based electrolyte and are available in flexible pouch formats. Their flexible form factor makes them suitable for compact devices, wearable electronics, medical devices and products with limited internal space.
Ni-MH batteries are rechargeable batteries commonly used in professional equipment, existing battery platforms and applications where Ni-MH technology is already part of the original device design.
Li-Ion batteries are a common choice for custom rechargeable battery packs where energy density, runtime and weight are important. They can be developed in different cell configurations and combined with custom connectors, wires and battery protection systems according to the device requirements.
Li-Ion is often considered when a device requires a relatively high energy-to-weight ratio and a compact rechargeable power source.
Li-Polymer batteries are especially useful when the available battery space is limited or the battery needs to follow a specific shape. Pouch cells allow greater flexibility in battery dimensions compared with many standard cylindrical-cell configurations.
Li-Polymer batteries are commonly considered for smartwatches, wearable devices, medical equipment, portable projectors, motorcycle communication devices and other compact electronic products.
Ni-MH batteries remain useful for many professional instruments and existing equipment platforms. When a device was originally designed around Ni-MH cells, developing a replacement or custom battery pack based on the required Ni-MH configuration can simplify the battery development process.
For a replacement battery project, the original battery chemistry, voltage, capacity, physical dimensions and connector should be evaluated before selecting a new configuration.
| Feature | Li-Ion | Li-Polymer | Ni-MH |
|---|---|---|---|
| Energy Density | High | High | Moderate |
| Shape Flexibility | Moderate | High | Moderate |
| Weight | Light | Light | Relatively Heavy |
| Custom Shape | Available | Excellent | Available |
| Typical Cell Voltage | Around 3.6–3.7V | Around 3.7V | Around 1.2V |
| Rechargeable | Yes | Yes | Yes |
| Typical Applications | Portable & Industrial Devices | Compact & Wearable Devices | Professional & Existing Equipment |
No single battery chemistry is suitable for every device. The right choice depends on the electrical, mechanical and application requirements of the product.
If the battery compartment has limited space or requires a specific shape, Li-Polymer pouch cells may provide more design flexibility.
The required voltage and capacity determine the cell configuration and overall battery pack design.
Portable products often need a balance between runtime, battery capacity, weight and available installation space.
For replacement projects, the original chemistry, voltage, capacity, dimensions, connector and wiring should be evaluated before development.
Medical devices, industrial equipment, wearable products and professional test instruments can have different battery design requirements.
Depending on the battery chemistry and application, the battery pack may require an appropriate protection and control solution.
Choosing the battery chemistry is only the beginning of a custom battery development project. The complete battery pack must also be designed around the device's electrical and mechanical requirements.
Voltage, capacity, size, runtime and application requirements.
Cell configuration, dimensions, connector and protection design.
Develop sample battery packs for device evaluation.
Verify the battery against project requirements.
Manufacture the approved custom battery configuration.
A custom battery manufacturer can evaluate the complete battery system instead of selecting cells based only on voltage or capacity. This is especially important when the battery must fit a limited space, connect to a specific device or meet a particular runtime requirement.
Battery configuration designed around your device.
Support from initial requirements through production.
Develop sample packs before mass production.
Manufacture custom battery packs according to approved specifications.
Both are rechargeable lithium-based battery technologies, but Li-Polymer batteries commonly use pouch cells that provide greater flexibility for custom shapes and compact battery designs.
Not necessarily. The appropriate chemistry depends on the device requirements, available space, energy requirements, weight, battery configuration and application.
Ni-MH can be considered when the original equipment uses Ni-MH technology or when the application has specific requirements that make Ni-MH suitable.
Yes. Custom battery packs can be developed according to the required voltage, capacity and cell configuration.
Custom dimensions and battery structures can be developed according to the available space and mechanical requirements of the device.
Existing battery samples, device specifications and battery compartment dimensions can be used as references during custom battery development.
Prototype development can be arranged to evaluate the battery configuration before moving to mass production.
Tell us your device model, required voltage, capacity, available battery space and application requirements. ShangGuo Technology can help develop a custom battery solution from prototype to mass production.
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