403040 Square Pouch Battery

403040 Square Pouch Battery

403040 can be used as smart watch battery, or it can also be used in various other small wearable devices.
403040 Square Pouch Battery


  • Rechargeable square pouch battery ideal for wearables and wireless smart devices, such as smart watch battery;
  • High capacity and long cycle life;
  • Fully certified;
  • 1 year product warranty;
  • Up to US$20 million product safety insurance


  • Bluetooth headphones and audios;
  • TWS charging cases;
  • Smart watches;
  • Pet trackers;
  • Wireless mice;
  • Wearable cameras;
And more......


Model Maximum Dimension (mm) Minimum Capacity (mAh) Internal Impedance (mΩ) Normal Voltage (V) Charge Ending Voltage (V) Maximum Charge Current Maximum Discharge Current
Thickness (mm)  Width (mm) Length
403040 4.0 30 40.0 430 130 3.7 4.2 1C/430mA 1C/430mA