Lithium-Ion Battery, Custom Battery Pack, 48V Battery manufacturer / supplier in China, offering High Voltage 44.4V E-Foil Battery Efoil Battery Systems with Waterproof Housing, OEM/ODM Efoil Battery Packs with Smart BMS and High Discharge Rates, OEM 44.4V 51.8V 20ah 30ah 40ah Efoil Lithium-Ion Battery Electric Surfboard Battery Outdoor Backup Fast Charge and so on.