Lithium-ion Battery Basic Parameters. Nominal Voltage: 36V/48V, Rated Capacity: 13AH/15AH/17.5AH/20AH. Applicable bike controller and motor: 50-1500W. Max Constant Discharge Current. 20A (BMS), 25A (BMS), 30A (BMS). 1 X Ebike Battery. 1 X User Manual. Please note: the voltage (V) of the battery needs to be the same as the voltage of your bike’s motor. The battery may be only 40-50% charged when you receive it, please charge it fully, and then test or use it. When charging, the charger indicator is red; after fully charged, it turns Green. Connect the red cable to the positive (+) port, and the black to the negative (-) port. If not use for a long time, please charge the battery every 3 months.