?? Li-ion Battery Parameter? Size: 33090mm. Built in Top A Grade Cell, the battery is 36V 10AH, 4 Pin base plate. Max Constant Discharge Current: 20A. Charger: DC 42V 2A. ? Safe Lock with two keys, prevents the battery from being stolen. ? LED power Indicator, informs you to charge the battery on time. ? Comes with battery base, it will fit most bike frames. It’s easy to remove and charge at home or bike. ? With a 20A BMS protection board to prevent overcharging, over discharging, overcurrent and short circuit. ??? Safety and Environmental Protection? The Ebike battery charge cycle exceeds 1000 times, life expectancy of up to 5 years. All Comfto batteries have CE, ROHS, and MSDS safety certifications, ensuring user safety in extreme usage scenarios. Do not connect the positive and negative terminals of the battery. Do not expose the battery to high temperature. Such as heating or instrong sunlight. Do not submerge the battery in liquid of any kind and avoid drenching with rain. Do not disassemble the battery without professional guidance. Keep the battery in the cool and dry place and charge it for two hoursevery two months if the battery is stored for a long time. Use specified charger only. Do not dispose of the battery in household waste and return to supplier or authorized recycle base if the battery is out of use.