-Bluetooth Headset Battery Replacement。
It can also be used in other 3.7-5V electronic products with power less than 3.33Wh (900mAh).
-802540 rechargeable lithium-ion polymer battery, nominal voltage 3.7V, full charge voltage 4.2V, capacity 900mAh,
-It can prevent overcharge, over-discharge, overcurrent, and short circuits.