ebike battery li polymer pack LiFePO4 48v rear rack battery Item No. Voltage Capacity battery type Lifespan BMS Option Charger Option Dimensions Weight JOY4810 48v 10ah lifepo4 >2000 cycles 20Amps 2Amps 69*148*370mm 4.8kg 25Amps 3Amps 48v rear rack battery Advantage a. Extremely safe and stable chemistry: PCB and/or BMS built inside to balance protect the battery. b. Long life-cycle: Can be circularly used, more than 2000 times recycles, 8 times of Lead acid battery. c. Lighter weight, with the best power-to-weight ratio: 1/3 of Lead acid battery weight. d. Good performance at high temperature and high temperature resistance e. Low self-discharge rate, less than 3% monthly. f. No memory effects and highly efficient charge. g. Environment friendly: Clean and Green energy poses no pollution on our environment. 48v rear rack battery Characteristics a. Waterproof battery box with rubber ring ; b. Portable handle and hidden charging port; c. Aluminium alloy Back rack(Silver and Black for option); d. Well die-casting slide board and lock, for easy installation and theft-prevention. e. 30A Fuse is included for protection