Bluetooth Headset Battery 401020 3.7V 55mAh Lithium Polymer Battery for Hearing Aids, Sensor Lights


  • Using material with high energy density-lithium cobaltate(LiCoO₂);
  • Long cycle life, low internal resistance, high current, high energy and smaller size;
  • Environmentally friendly, free of mercury, chromium, lead, and other hazardous substance;
  • Quality assurance with BPI batteries UL, CE, KC, PSE, and UN38.3 certified;
  • Incorporated protection circuitry for over-charge over-discharge and short circuit protection, which makes sure high security.



Smart wearable devices, TWS earbuds, Bluetooth headset, hearing aid, smart bracelet, sensor light, tablet, electric razor, walkie-talkie, GPS tracker, etc.

Model: 401020-55mAh Nominal Voltage:  3.7V
Power: 0.204Wh Shipping Voltage:  3.8V-3.95V
Charging Cut-off Voltage:  4.2V Discharge Cut-off Voltage: 3.0V
Internal Resistance: ≤500 mΩ Standard Charging Current: 0.2C
Max. Charging Current: 1.0C Standard Discharge Current:  0.2C
Max. Discharge Current: 1.0C Nominal Capacity:  55mAh
Dimension: 5.0* 10.0*20.0mm (Max.) Charge Temperature: 0℃- +45 ℃
Discharge Temperature:  -20℃- +60 ℃ Cycle Life:  300 times >80%
Certification: UL, CE, KC, PSE, RoHS, UN38.3, MSDS…
Safety Protection:  Overcharge, over-discharge, over current and short circuit protection