Associated 6023 60/50/25/300 Amp 6/12/24 Volt Commercial Automotive Battery Charger. The Flagship Model 220 volt fleet car battery charger on the market, with a boost rating of 300 Amps. Charges 6, 12 and 24 volt batteries. UL listed for indoor/outdoor use, "Safe In Any Weather". Charges 6, 12, and 24 volt batteries. Heavy-duty transformer, patented "Sub-Sil" multi diode rectifiers, longer AC cord and DC leads are standard features for higher performance. UL listed for indoor/outdoor use, "Safe In Any Weather".