The GENM1 is an On-Board Battery Charger for charging and maintaining a single 12-volt Marine, Starter or Deep-Cycle battery. It's waterproof, shock and vibration resistant rugged design can be mounted directly onto a variety of applications, including a boat, trolling motor or generator, as well as, a full range of electric vehicles and industrial equipment. It monitors battery activity for safe, fast and efficient charging of Wet, Gel, AGM and Maintenance Free batteries without the worry of overcharging. And it's one of the most advanced charging systems designed for improved battery performance and longevity.