12V and 24 Volt Charger for Cars, Boats, RV's and Trucks - 2 Year Warranty Electronically protected against overcharge, short circuit, reverse polarity and overheat Fully automatic diagnose, recover, charge and maintain For all Lead-acid batteries (WET, MF, AGM and GEL) Automatically diagnose, recover, charge and maintain batteries for months Fully automatic from charge to maintenance mode