The battery is equipped with a smart BMS, which protects battery from over-charge, over-discharge, over-voltage, over-current, short-circuit and temperature protection to ensure the safety. The battery has a certain waterproof function, you don't need to worry about it when it rains. But for safety, we still suggested that the battery is not in contact with water. The charger comes with the battery, you do not need to buy a charger for this battery. Life expectancy is two times that of lead-acid batteries, up to 5 years. Our battery can work at a temperature of -20℃-55℃, and the discharge efficiency can reach 95%. 36V Ebike Battery Lithium Battery Pack Description: Nominal voltage: 36V Rated capacity: 6AH 8AH 10AH 12AH 15AH 18AH Weight: 5Kg Dimension: 148*150*257*64mm Fit for Motor: 100W 250W 450W 500W 650W Charging time: 5-7h Charger: 42V 2A Storage temperature: 0 ° C ~ 30 ° C Range of working temperature：Charging: 0~45°C / Discharge: -20~60°C Package includes: 1 x Battery 1 x Charger 2 x Key Accessories Note: Please note only 36V battery fit for 36V ebike. Please check the size and applicable motor range （100W-650W）. AH is only related to the driving time. Carefully explore the battery configuration before buying and do not hesitate to contact us.