6002B Charger, 6/12/18/24V 100/80/50/40A, 400 Amp Cranking Assist, Wheels 100/80/50/40 Amp continuous rating Vacuum impregnated heavy-duty transformer to seal the unit against external agents Multi-diode rectifiers (patented) to take over in case of failure Fan cooling mechanism prevents overheating enhancing units life span significantly UL and CSA listed with ��Safe in Any Weather�� operation