BP2 is a specially developed Li-ion battery that can be integrated into the inflator of the EP2. BP2 can be fully charged in 2 hours via the EP2's cigarette lighter plug by connecting it to the car or via the mains adapter supplied. Features: - Li-ion battery with 6Ah - 11.1Vdc - BMS (Battery Management System) - Weighs 450g. - Power supply 100/240Vac (50-60Hz) 1.3A / output 15.0Vdc - 3A