A fully automatic 3-stage portable charger designed for fast, full charging and maintenance. Completely sealed in a durable potted case, it's waterproof, shockproof and corrosion proof. It features built in electronic overload and thermal protection, LED ready indicators, reverse polarity protection, and a carrying handle for easy portability. This powerful 6 amp unit comes prewired with a 6-ft. AC cord and 4-ft. DC output wire with alligator clips. Can be left connected indefinitely.