1,Intelligent battery charger, controlled by Microprocessor 2,Supply 48V,60V,72V,96V etc. 3,Effiency: 95%,CE certificate. Silicon Battery Charger Features ... , or we can make 110V/220V voltage selector for charger can use both 110Vac and 220Vac.2,Efficiency: 85%- ... 50 ,Storage temperature:-10 - +60 . If you have any other optional functions requirements about battery charger , please feel free to ...