Offers the fastest charge times available. A super-charged replacement for an existing unit, they use the same footprint as other popular original equipment chargers. No new drilling or holes required. Fully automatic 3-stage charging (bulk, absorption and maintenance) For use with 12V/6-cell batteries (50-130 amp hour rating) that are flooded/wet cell, maintenance free or starved electroyte (AGM) only. Waterproof, shock-and vibration-resistant construction. Saltwater tested and fully resistant to corrosion. Short circuit, reverse polarity and ignition protected. FCC compliant, UL Listed to 1236 standard.