Providing endless jump starts for commercial fleets or heavy construction equipment, this unit will start (spin the starter) of any 12 Volt or 24 Volt engine. Recharges with AC current or connects permanently to the vehicle's 12 Volt Alternator. A 10 Amp industrial charger maintains its own lead-acid storage battery and recharges most lead-acid batteries within 4 to 8 hours depending on the number of batteries being charged. The charger constantly monitors its storage battery or the battery it's charging, topping off as needed. It may be used to charge maintenance-free, conventional, deep cycle, gelled electrolyte, and recombination batteries.