The Schumacher SC1357 6A 6V/12V Automatic Battery Charger and Maintainer is perfect for all basic charging applications. This charger and maintainer make it easy to charge power sport and automotive batteries with a 6A charge and a 3A maintain mode. A microprocessor automatically changes the amperage rate, with multi-stage charging and float mode monitoring for great charging and maintaining to extend battery life. Includes simple start/stop interface and reverse hook-up protection which prevents the charger from operating if the clamps are reversed. Compatible with standard and AGM batteries. For added precision, safety, and battery life.