... charger 12 volt 1.Durable in use 2.Safe and reliable 3.Small size, low weight. 4.Advanced ... 220V voltage selector for charger can use both 110Vac and 220Vac.2,Efficiency: 85%-90%.3,Convection cooling ... Over current, over voltage. over temperature, short circuit and reverse polarity protection.8,Led display charging states.9,Can ... Small size, low weight battery chargers for motorbike and e-bike