ACDelco I-7005T 40 Amp Battery Charger with Clamps AcDelco I-7005T Battery Charger is a automatic microprocessor controlled battery charger. It is designed to charge 12 volts rechargeable lead acid batteries with rated amp hour capacity of no less than 12 Ah. It designed to use on Gel cell batteries such as those used in cars, trucks, farm equipment, boats, lawn mowers, tractors, airplanes, motorcycles, vans, RVs and SUVs, personal watercraft, snowmobiles, ATVs, trolling motors, etc. Lighted, digital display shows charging voltage, charging current, % Charge, Error Codes and Operation Mode. Charge rate settings of 2,10,20,30,40A, PLUS a special Maintenance mode which sends a controlled pulse which helps slow down the effects of plate sulfated. It also features the voltage measurement, % charge of the battery, spark free design, built-in battery test, over charge and over heat protections. Select the appropriate charging rate for the battery to be charged. The charger will display FUL till the battery is fully charged. Following, the charger will go into maintenance mode automatically to warm up the battery from discharging and maintain a full charge.