... constant current)charge to 54.6V, then CV(constant voltage 54.6V)charge till charge current decline to ≤0.01CCharge time : Approx 6h8Standard dischargeConstant current 2Aend voltage ... circuit, anti-over charger, anti-over current, anti-overload3.Compose Type : Injection Technology to make battery more stable4.Certifications ... 48V 15Ah Lithium Electric Bike Battery with Charger, PCB and BMS, 30A