... current:3A,5A,10A,20A,300A BETTERY CHARGERGCA series commutate battery charger is composed with rectifier transformer,bridge type controlled recifier and ... 5A,10A,20A,30A,50A,80A,100A,200A,300ACharging voltage12V,24V,36V,48V,60V,72V,110V,120V,220VFrequency50/60HZTransfer efficiency≥90 ... %Operation modeContinuously for ling periodStanderd charging10% of the battery capacity is best battery charger