This Attwood Battery Maintenance Charger is a fully automatic on-board charger that reliably maintains the charge of a 12-volt battery. It provides a 1.5-amp maintenance charge to keep the battery properly charged for sure starting and reliable power to lights and accessories. This charger is water-resistant, has short-circuit connection protection, and it has reverse polarity protection. An LED indicator reports the charging status. Attwood Corporation has been an award-winning leader in engineering, testing, and manufacturing the highest quality marine products for over 100 years. We deliver safe and reliable lighting, fuel systems, water systems, seating & pedestals, swim ladders, custom upholstery, and general marine accessories that are easy to install and meet regulatory compliance.