LIR1040 Rechargeable Lithium Battery 3.6V 35mAh LIR 1040 for TWS Bluetooth Headset Earphone Battery Model: LIR1040 Dimensions: 10*4.0mm Nominal voltage: 3.6V Charging voltage: 4.2V Nominal capacity: 35MAH Operating temperature: -20~+85°C Storage temperature: -20~+60°C Working temperature discharge: -20~+60°℃ Discharge cut-off voltage: 2.75V Working temperature charging: 0~+45℃ Storage temperature: -20~+60°C Applicable product:toy, calculator, laser pointer, computer motherboard, e-dictionary, watch, electronic scale, cardiac pacemaker, electronic hearing aid, counter, clock, watch, game, digital camera ect Packing List: 2PCS*LIR1040 Rechargeable Battery