... could offer1,Ac input: 110Vac or 220Vac as per customers' required, or we can make 110V/220V voltage selector ... for charger can use both 110Vac and 220Vac.2,Efficiency: 85%-90%.3, ... 7,Over current, over voltage. over temperature, short circuit and reverse polarity protection.8,Led display charging states.9,Can ... Constant charging current battery chargers with high quality