Specifications:Number of cells: 6Voltage: 12VNominal capacity: 33Ah at 20-hour discharge to 1.80V per cell at 25°CInternal resistance: 9mOhmTerminal type: F11 (M6)Maximum discharge current: 330A (5 seconds)Short-circuit current: 825ASccess life: 7 yearsMaximum charging current: 9.9AResource 300 cyclesCharging voltage in buffer mode: 13.6V~13.8V at 25°C Temperature compensation: -3mV/°C/cellCharging voltage in cyclic mode: 14.6V~14.8V at 25°C Temperature 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: The 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.