Battery type: Li-ion Standard voltage: 18.5V Standard Capacity: 500mAh to 50Ah Application:Led lights, Backup power, clothing, Laptop, MID, ebike, wheel ... , please contact us soon. Battery Type: Li-ion BatteryStandard Voltage: 18.5 VStandard Capacity: 500 mAh to 50 AhMaximum Charge Voltage: 21 ... Discharge temperature: -20 °C to 85 °C Storage humidity: ≤ 75% 18.5V Lithium ion polymer battery pack