48V 8.4Ah Electric bycle battery

1.type :48V 8.4Ah LiFePO4 Battery Pack 2.Basic Specification and Performance 2.1 Capacity Rated Capacity:8.4Ah(0.5CA Discharge) Test Capacity:8.4±3% Ah Ah(0.5CA Discharge) 2.2 Rated Voltage 48V 2.3 Overdischarge protection of a single battery 2.2±0.1V 2.4 Overdischarge restoration conditions Disconnect the load or charge the battery pack 2.5 Overdischarge protection time delay 100±50mS 2.6 Overcharge protection of a single battery 3.9±0.03V 2.7 Overcharge resuming voltage 3.8±0.05V 2.8 Overcharge time delay 1±0.5S 2.9 Working current <20A 3.0 Overcurrent protection 40±10% A 3.1 Overcurrent protection time delay 10±5mS 3.2 Short circuit protection Have this feature 3.3 Charge balance voltage 3. 6V 3.4 Balance current 70-80mA 3.5 0.5C Cycle Life0.5CA Carry out 2000 cycle,higher than 70% of the Rated Capacities of the Cells 3.6Dimension (max) 380*110* 75mm 3.7 Operational Temperature charge:0 45°C; discharge: -20 70°C 3.8 Storage Temperature within a month: -5 35°C within six months: 0 35°C 3.Testing Condition Please perform under this condition: Standard temperature: (20±5°C), standard humidity: (65±20%) 6.1 Standard Charge Constant current and constant voltage charge constant current :2000mA voltage upper limit:54.7V cut-off current :84mA 6.2 Standard Discharge constant current discharge constant current:4200mA cut-off voltage:30V 4.Charge Description: 4.1 Charge Voltage:Direct Voltage54.7V 4.2 Charge Current:Direct Current 2A