Automatic Multi-Stage chargers keep you on the water longer and extend your overall battery life. It monitors temperature and state of charge to create a faster, regulated, more precise charge. Includes automatic shut-off when charging is complete. The automatic temperature compensation is designed to sense outside temperature fluctuations and adjust accordingly, delivering a fast, accurate charge. For use with a 12 volt system with 12v/6 cell lead-acid batteries. Including: Flooded/Wet Cell, Maintenance Free and AGM/Starved Electrolyte.