6/12/24 volt commercial fleet charger rejuvenates all standard and maintenance-free batteries with five charging positions. 70/65/30 amp chrge with 280 amp crank assist at 12 volts. Vacuum impregnated heavy-duty transformer to seal the unit against external agents. Multi-diode rectifiers to take over in case of failure. Fan cooling mechanism prevents overheating. CSA listed with "Safe in any Weather" operation. 500 amp clamps are covered with vinyl installation. Pateneted "Flexi-Spring" cable guards relieve cable stress. Heavy duty chrome plated handle. 53 lbs ship weight. * Made in the USA.