Introduction
The battery of Bluetooth headphones 300mAh uses a 3.7V Li-Po cell. It is small and lightweight, suitable for audio devices with high space and reliability requirements.
Advantage
Long-Lasting Power
The 300mAh capacity provides stable battery life within a compact size.
High Safety
Passed a 1-meter drop test with no fire or leakage.
Fast Charging
This Bluetooth headphone's lithium polymer battery supports up to 1.0C fast charging, fully charging in approximately 2 hours.
Stable Cycle Life
≥300 charge-discharge cycles with low capacity decay, suitable for Bluetooth audio devices used for extended periods.
Specification
|
Items |
Specifications |
|
Batteries |
3.7v 300mAh 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 |
Customization
|
Customizable Item |
Customizable Content |
|
Cell Dimensions |
Length, width, thickness |
|
Voltage |
3.7V / 3.8V / 4.2V |
|
Capacity |
Tens to thousands of mAh |
|
Discharge Rate |
1C ~ >3C |
|
Fast Charging |
Standard or rapid charge |
|
Protection Circuit |
Overcharge, over-discharge, overcurrent, short-circuit, temperature control |
|
Smart Management |
Optional Bluetooth, I²C, or SMBus integration |
|
Packaging & Connectors |
Wire length, terminal type, and connector customization |
Our Certificate
We possess CCC certification, ISO 9001 quality system certification, KC certification, UL certification, RoHS standard certification, two invention patents, and one utility model patent.

FAQ
Q: Can you provide OEM/ODM customization services?
A: Yes, we provide worldwide OEM customization, including cell dimensions, voltage, capacity, discharge rate, protection circuit, and connectors to meet different product needs and applications.
Q: Could I get a sample for checking the quality?
A: Sample testing is available. Please click here to get the sample policy.
Q: What's the lead time of production?
A: It depends on the order quantity. Normally, the lead time is about 5-7 working days for a mass order.
Q: What kinds of payment can I pay with?
A: L/C, T/T Bank transfer, Paypal, Western Union, Alibaba Trade Assurance.
Q: How about the warranty time?
A: Our products come with a 12-month warranty, 100% replacement for free if a quality problem occurs.
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