... charger four sections of charging mode, greatly extend battery life. 3. Charging high efficiency, low standby ... 4. Have very comprehensive protection function, in the battery under voltage, over voltage, over current,over ... Output Power: 90W 120W 200W 300W Battery Voltage: 24V 36V 48V 60V Battery Type: LiFePO4/LiMn2O4/LiCoO2 Charging constant ... question . many kinds of fast electric bike battery charger