Type: Li-Ion Nominal Voltage: 12v Size: customised Nominal Capacity: 51Ah Composed type: 4S17P Charging end-off voltage: 14.6V Discharging end-off voltage: 8V Weight: 5.8kg Charging method: CC-CV Battery cell: lifepo4 26650 3000mah Application: Solar System Warranty: 5 Years