Product Description: Specification: 1. Normal Voltage:36Volts. 2. Lifecycle: 800Cycles.. 3. Capacity: 20Ah. 4. Charge Current: 4Amps. 5. Maximal Continuous Discharge C-Rate: 50Amps. 6. Maximal Discharge Current: 100Amps. 7. Overvoltage Protection: 42Volts. 8. Undervoltage Protection: 28Volts.