With precision on-board chargers on each bank, you can select what battery type you have connected - AGM, gel, or flooded lead acid - to guarantee a safe, protected charge. Low-Line voltage compensates for overloaded outlets and long extension cords that do not put out 120 volts to deliver a fast, consistent charge no matter what. Minn Kota stands behind every on-board battery charger with a full three-year replacement warranty.