15 Amp series charger offer the fastest charge times available. A super charged replacement for an existing unit, they use the same footprint as other popular original equipment charges. 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 electrolyte (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.