... . 2,Charging Max Current: 10A,15A,20A,30A 3,Automatic charger. 4,CE General Features : 1,Ac input: 110Vac or 220Vac ... ' required, or we can make 110V/220V voltage selector for charger can use both 110Vac and 220Vac.2,Efficiency: 85%-90 ... :-10 - +60 . Please send me inquiry,any questions about battery charger.