Specifications:Number of cells: 6Voltage: 12VNominal capacity: 20Ah at 20-hour discharge to 1.75V per cell at 25°CWeight: 5.34kg (Tolerance ±5.0%)Internal resistance: 14mΩTerminal type: F13 (M5)Maximum discharge current: 200A (5 seconds)Short-circuit current: 820ASccess life: 7 yearsMaximum charging current: 6.0AResource 800 cyclesCharging voltage in buffer mode: 13.7V~13.9V at 25°CTemperature compensation: -3mV/°C/cellCharging voltage in cyclic mode: 14.6V~14.8V at 25°CTemperature Compensation: -4mV/°C/cellOperating Temperature Range: Discharge: 10°C~60°C Charge: 10°C~50°C Storage: 10°C~60°C Normal Operating Temperature Range: 25±5°C Case Material: A.B.S. UL94-HB, UL94-V0 Self-Discharge: Rechargeable Gas Regulated Lead Acid (VRLA) AGM battery can be stored for up to 6 months at 25°C and then recharging is recommended. The monthly self-discharge rate is less than 3% at 25°C. Please charge the batteries before use.