Minn Kota MK 230 PC Precision On-Board 2-Bank Charger, 15-Amp 2 bank x 15 amps Waterproof, shock and vibration resistant aluminum construction Unparalleled durability Saltwater tested, rugged marine grade aluminum housing and fully corrosion resistant design Short circuit, reverse polarity, arc and ignition protected Digital control for a faster, more regulated, precise charge for your battery and a longer day of worry free fishing for you