Save A  Battery 2365-6 6-Volt Battery Charger and Maintainer 6-Volt, 50-Watt unit charges and maintains batteries with fast-acting pulsing technology Extends battery life the longer it is plugged in Safe to use, with over-current, over-voltage, short-circuit and reverse polarity protection Unique modular cable design offers a variety of connectors and lengths, and can be changed quickly and easily Lightweight, compact and easy to transport