The Schumacher SC1339 Battery Charger and Maintainer is a great option for most general charging applications. The microprocessor automatically adjusts the amperage rate, with multi-stage charging and float mode monitoring for optimum charging and maintaining to extend battery life. Includes simple start/stop interface, LED light indicators that track the charge status, and reverse hook-up protection which prevents the charger from operating if the clamps are reversed. Schu Eco Energy meets the highest industry standards. Compatible with standard and AGM batteries.