E&J manufacture top quality Lithium electric bike batteries to fit every make and model of electric bikes. We supply 24 volt Lithium batteries,36 volt lithium batteries and 48 volt lithium batteries and other voltage range LiFePO4 Lithium battery packs for electric bikes. Using high quality famous li-ion 18650 cells like Panasonic, Samsung, Sanyo, SONY, the BMS are also using high reliable quality ICs and mosfet to protect the e-bike battery packs not over-charged, not over-discharged and not short circuit.Reliable internal battery structure design to ensure the battery cycle life are long to reach 500 cycles.