... /30A, GCA 6-36V/5A, GCA 6-36V/10A, GCA 6-36V/20A, GCA 6-36V/30A, and GCA 6-36V/50AWith features of excellent ... : manual switching for GCAFrequency: 50Hz -60HzCharging voltage: 6V, 12V, 24V, 36V, 48V, 72VAmbient temperature: 10±40°COverall temperature rise: ≤60°CRelative ... humidity: 80%Switching of charging voltage: GCA exchangeable BATTERY CHARGER by manual