Custom 3.7V Lithium Battery Packs
– High Energy Density & Lightweight
The 3.7V lithium-ion battery is the most fundamental voltage platform of lithium-ion battery technology. It typically adopts a single-cell structure and is widely used in small electronic devices.
LARGE provides custom 3.7V lithium battery pack solutions, with flexible design options for capacity, dimensions, protection circuits, and connectors — meeting the needs of highly integrated and lightweight lithium battery applications.
Platform Features
- Single-cell structure, simple system design
- Compact and lightweight for easy integration
- High energy density for low-power electronics
3.7V Lithium ion Battery Specifications
| Nominal Voltage | 3.7V |
| Capacity Range | 500mAh – 10Ah |
| Charge Voltage | 4.2V |
| Discharge Cut-off | 2.75–3.0V |
Note: Specifications can be customized based on device size and power consumption.
3.7V Lithium ion Battery Pack
The following specifications are for reference only. An exclusive customized solution can be provided according to your project requirements.
Applications of 3.7V Lithium ion Battery
Small Devices & Portable Electronics
3.7V lithium batteries are widely used in applications with strict size and weight requirements, particularly low-power and portable devices.
Consumer Electronics
Smartwatches · Fitness bands · TWS earbuds · Portable projectors
Compact, lightweight, and customizable for compliance
Medical Devices
Portable monitoring equipment · Compact diagnostic devices
Stable and reliable power supply
Instruments & Meters
Handheld measuring tools · Portable testing devices
Long runtime with low-power operation
Looking for the right battery solution for your device?
We provide professional customization based on
your application requirements.
your application requirements.
3.7V Single-Cell Battery Platform Features
3.7V is the most basic voltage platform of lithium-ion batteries and typically consists of a single cell. Due to its simple structure and compact size, it is widely used in low-power electronic and portable devices.
In product design, a 3.7V battery can function as an independent power unit or serve as a building block in multi-series battery systems. With proper power management circuits, it can provide stable output for various voltage requirements.
Key considerations include battery capacity, runtime expectations, and dimensional compatibility with the device structure. Charging management circuits and protection systems are essential to ensure safe operation.
With proper power management design, a 3.7V battery delivers stable and reliable power for small electronic devices.
Related Lithium Battery Voltages
Frequently Asked Questions (FAQ)
Are you a lithium battery manufacturer?
Yes, we are a China-based manufacturer specializing in customized lithium battery solutions, including small-size battery development.
Do you support small-batch customization?
Yes. We support prototyping and mass production, with customization available for size, capacity, and protection circuits.
What is the voltage range of a 3.7V lithium battery?
The typical operating voltage range is 3.0V–4.2V (4.2V fully charged, 3.0V cutoff voltage).
How to charge a 3.7V lithium battery?
It uses a constant current / constant voltage (CC/CV) charging method and requires a dedicated lithium battery charging circuit.
What is the charging voltage of a 3.7V battery?
Standard charging voltage is 4.2V. High-voltage cells may require 4.35V or 4.4V charging.
How long does charging take?
Depending on capacity and charging current, typically 2–5 hours.
What types of 3.7V lithium batteries are available?
Common types include:
18650 cylindrical cells
21700 cells
Pouch cells
Lithium polymer batteries
What is the difference between button-top and flat-top 18650 batteries?
Button-top cells usually include built-in protection and have a raised positive terminal, suitable for direct replacement in devices.
Flat-top cells have a flat terminal and are typically used for battery pack assembly with an external BMS.
Get Your Custom 3.7V lithium battery Solution
Looking for a stable and reliable battery solution?
We provide integrated support from engineering design to mass production.
We provide integrated support from engineering design to mass production.