Battery type: Li-ion battery; Capacity: 50mAh to 50Ah; Voltage: 3.7V; Size: different size Application:Led lights, Backup power, clothing, Laptop, MID, ebike ... Details, If you have any problems, please contact us soon. Battery Type: Li-ion BatteryStandard Voltage: 3.7 VStandard Capacity: 500 ... : -20 °C to 85 °C Storage humidity: ≤ 75% 3.7V Lithium ion polymer battery