421036 Square Pouch Battery

421036 Square Pouch Battery

421036 lithium ion battery for fitness trackers and bluetooth earphones.
421036 Square Pouch Battery


  • Rechargeable Li-ion battery for fitness trackers, bluetooth earphones and wireless smart devices;
  • High capacity and long cycle life;
  • High voltage with enhanced energy density;
  • Fully certified;
  • 1 year product warranty;
  • Up to US$20 million product safety insurance.


  • Bluetooth earphones;
  • Fitness trackers;
  • Pet trackers;
  • Smart pens/styluses; 
  • Smart glasses;
And more......


Model Maximum Dimension (mm) Minimum Capacity (mAh) Internal Impedance
Normal Voltage (V) Charge Ending Voltage (V) Maximum Charge Current Maximum Discharge Current
Thickness (mm)  Width (mm) Length
421036 4.2 10.5 36 150 200 3.8 4.35 1C/150mA 1C/300mA