Tips: How To choose a well-fit replacement battery? 1. Choose Voltage: The voltage of battery must match the voltage of your controller and motor. The voltage of the original battery is usually marked. If not, check the original battery charger. Note: Don't choose the wrong voltage, otherwise, it will destroy your ebike. 2. Choose Capacity: It depends on the power of motor . The motor power is large,the corresponding current is large, choose a large capacity battery. Basic Parameters: 60V 48V Ebike Batteries Max Current: 30A(BMS) Rated Voltage/Capacity: 48V 12Ah 18Ah 20Ah 25Ah 32Ah, 60V 10Ah 15Ah 20Ah. Fit Motor Power: for below 1600W motor kit Size: 90mm × 190mm × 295mm 48 Volt 60 Volt Li-ion Battery Weight(kg): 4-9 kg 60V 48V Removable Battery Charge Time: 6-8 hours Charger: 54.6V/67.2V 2A/3A Service Time: about 1100 times Working Temperature: Charging: 0 to 50℃ Discharging: -10 to 40℃ Storage: -20 to 40℃ Product Contains: Battery × 1 Charger × 1 Service Guarantee: We can repair or replace the battery for you during the 12-month. PLEASE CONTACT US ANY TIME IN ANY QUESTIONS, such as: battery does not work, no charge, package has not arrived or damaged and other battery questions.