The highest performance fleet charger on the market comes with our best manufacturer's boost rating of 600 AMP. 400 cold crank amps. Charges 6, 12, 18, and 24 volt batteries. Heavy-duty transformer, patented 'Sub-Sil' multidiode rectifiers, longer AC cord and DC leads are standard features for higher performance. UL listed for indoor and outdoor use, "Safe in any weather." Longer AC cord and DC leads ae standard features for versatility. Automatic reset AC and DC circuit breakers.500 AMP fully insulated "Flexi-Spring" clamps. Automatic timer, patented "Stop/Go" light. Heavy-duty chrome plated handle with clamp-holder/bar. Hinged steel cover to protect meters and knobs. Rugged 7" tires.