Specification: Battery pack: 48.1V 20Ah Li-NCM battery pack Cell Type: 3.7V 10Ah cell Lithium nickel cobalt manganese oxide cell Battery pack Dimension (L*W*H): 183*171*162 mm Metal case Battery pack Weight: 8.5 kg ± 0.5 kg Operation Voltage of battery pack: 48.1 V Charging Voltage of battery pack: ≤ 54.6 V Discharge Cut-off Voltage, pack level: Around 40V Discharge Cut-off Voltage, cell level: 3.0 V ± 0.05V Nominal Discharge Current: ≤ 50 A ( 23°C / 77°F) Maximum Discharge Current(Less than 1 minutes): ≤ 60 A ( 23°C / 77°F) Nominal Charge Current: ≤ 8 A ( 23°C / 77°F) Operating Temperature Charge: 0°C ~ 45°C Discharge: -15°C ~ 50°C