36v 48v e-bike silver fish battery pack 42v 20ah 15ah 12ah 10ah electric batteries for 36v500w 350w 250w folding bike city bikes

lithium battery features: 1.high energy density, fast charging 2. light weight, small size pollution- environment friendly 3. long cycle life; it extends its cycle life up to 600-800 cycles 4. with short-circuit production function, safe and reliable 5. large overcharge tolerance and safe performance the batterylife is more longer 6. simplifying battery management system (bms such as overcharge/ discharge,over current, short circuit, over temperature andbalancing) and battery charger