Introduction

The 3.7V 250mAh Lithium-Ion Polymer Battery is a lightweight and slim lithium battery, suitable for providing continuous power to smart wearables, Bluetooth devices, and miniature electronic products.

Parameter

Batteries	3.7v 250mAh lipo battery
Charge voltage	4.2V
Nominal voltage	3.7V
Nominal capacity	250mAh 0.2C Discharge
Charge current	Standard Charging: 0.5C Rapid charge: 1.0C
Standard Charging Method	0.5C CC(constant current)charge to 4.2V, then CV(constant voltage 4.2V)charge till charge current decline to ≤0.05C
Charging time	Standard Charging: 2.75hours(Ref.) Rapid charge: 2hours(Ref.)
Max. charge current	1.0C
Max. discharge current	1.0C
Discharge cut-off voltage	2.75V(0.2C)
Operating temperature	Charging: 0 °C ~45 °C Discharging: 0 °C ~45 °Carging: 0 °C ~45 °C
Discharging: Storage temperature0 °C ~45 °C	-10°C~ +45 °C
Dimension	Length: 50±2mm (not including tabs) Width: 20±0.5mm Thickness:10±0.2mm
Drop Test	The cell is to be dropped from a height of meters twice onto concrete ground. No fire, no leakage
Cycle time	≥300times

Features of Lithium Ion Polymer Battery 3.7 V 250mah

Consistent Dimensions
Battery dimensional tolerances are controlled within ±0.2mm, ensuring stable assembly during mass production without compromising structural design or assembly efficiency.

Pouch Cell Structure
The 3.7V 250mAh Lithium-Ion Polymer Battery uses an aluminum-plastic pouch design, making it lighter and more flexible than steel-cased batteries, and allowing custom shapes like L-type, ultra-thin, or compact rectangular designs for space-limited devices.

Excellent Batch Consistency
The sorting process ensures consistent capacity and internal resistance, making it ideal for large-scale mass production.

Comprehensive Export Certifications
Supports UN38.3, CE, and RoHS certifications, meeting international shipping and market access requirements.

Customization

Item	Customization Details
Capacity & Discharge Rate	Adjustable capacity and discharge rate based on device power consumption requirements
Structural Dimensions	Non-standard customization of thickness, width, and length supported
Connection Method	Customizable JST, Molex connectors and wire length options
Protection Solution	Different PCM protection board configurations available, enabling overcharge, over-discharge, and short-circuit protection for various application scenarios

FAQ

Q: How does the 3.7V 250mAh Lithium-ion Polymer Battery work?

A: The 3.7V 250mAh Lithium-ion Polymer Battery facilitates charging and discharging through the movement of lithium ions between the positive and negative electrodes, providing a stable DC power output for devices.

Q: Which devices is it suitable for?

A: It is suitable for powering smart wristbands, Bluetooth earphones, medical monitoring equipment, and small-scale IoT terminals.

Q: What is the lead time?

A: The lead time for standard models is approximately 7–15 days; for customized models, the lead time is adjusted based on the complexity of the design solution.

Q: How is it packaged?

A: It is packaged using anti-static trays and shock-resistant cartons to ensure structural stability during transportation.

Q: How is it charged?

A: It utilizes a 4.2V constant-voltage charging method; charging control can be managed via a standard lithium battery management module.

Q: Is it safe?

A: The 3.7V 250mAh Lithium-ion Polymer Battery features a soft-pack separator structure and an integrated protection circuit design, which helps mitigate the risks of short circuits and overcharging.

Q: How should it be stored?

A: It is recommended to store the battery at approximately 40% charge capacity in a cool, dry environment to extend its service life.

Q: Is it eligible for export?

A: The 3.7V 250mAh Lithium-ion Polymer Battery complies with UN38.3 transportation standards, meeting the requirements for international logistics and air freight.

Q: Is brand customization available?

A: We support custom logo silk-printing and packaging customization to meet the branding requirements of your products.

Q: What are the purchasing options?

A: We support both sample testing and bulk ordering modes, allowing you to place orders flexibly according to your specific needs.