Wheel charger for 12V batteries provides roll-around convenience and features high-output engine start. Great for do-it-yourselfers, mechanics and fleet operations. Use for both slow and fast charge applications thermal breaker protects against overloads and reverse hookups. Heavy-duty 6 or 8-gauge wire, 6′ multi-strand cables flexible to -40 degrees. Solid-state circuitry. on/off switch. 2-1/4 hour 35-Amp rapid charge for charges in 1 to 3 hours. 2-amp trickle charge for charging small 12-volt batteries in 2 to 12 hours.