Spark proof during lead connection, reverse polarity protected and includes a 12-foot output cord and 5-year warranty. Perfect for charging all 12-volt lead-acid, flooded or sealed maintenance free batteries (AGM and gel cell). Complete 4-step charging program (Initialization, Bulk Charge, Float Mode) allows for optimization of battery power, without overcharging. Automatic charge cycle functionality switches to float mode after fully charging the battery. Solid state two color LED indicates stage of charger.