Specifications BrandUNITPACKPOWERModelR009 21 52Battery TypeLi ion BatteryRated Voltage48VRated Capacity20AHBattery Cell2500mAhBuilt in BMS30ABattery Weight7kgDimension457 103 60mm Feature 1 User friendly Design The light weight design makes the battery easy to install and remove The black hard plastic shell protects the battery effectively and the LED battery level indicator can inform you of charging in time The USB port can charge your phone and other devices in outdoor Equipped with battery holder just need to use the key to open the safe lock 2 Safe to Use Built to the highest standards that has been tested When the motor is overloaded the system automatically switches off to protect the technical components against damage The battery is fully sealed and designed to be using long even on muddy roads 3 BMS Protection Board The high quality battery is equipped with a 30A BMS protective plate which prevent over charge over discharge over current and short circuit and ensure the long life expectancy 4 Stable The input and output are more stable and its large capacity makes the service life of battery longer 5 Ergonomic Design and Widely Applicable The electric bike battery pack has a mounting bracket that will mount to most water bottle screw holes in the frame Compatible with 48V electric bikes bicycles mountain bikes and more Package includes 1 x Electric Bike Battery1 x Charger and AC wire2 x Keys1 x User Manual