battery charger model:GCA series commutate bettery charger input voltage : 220 V or 380V charging current:3A,5A, ... 10A,20A,300A BETTERY CHARGERGCA series commutate battery charger is composed with rectifier transformer,bridge type controlled recifier and ... efficiency≥90%Operation modeContinuously for ling periodStanderd charging10% of the battery capacity is best battery charger