Battery Model: 602535 Type: Li-polymer battery Voltage:3.8V Capacity: 600mAh Charging Voltage: 4.2V Rechargeable: YES Working Temperature: -20°~60° Net Weight: About 18g Size(L*W*H): About 50x34x5.4mm Fit for:Intelligent bracelet,Kid-learning,Bluetooth speakers,Bluetooth headset,Dash-recorder,Camera,Electronic door lock,massager and so on Features: (1)Batteries do not contain mercury,lead,cadmium and other harmful metal substances green environmental protection,safe and reliable. (2)With protection board,short circuit and over temperature protection