The Craftsman 12A Automotive Battery Charger is a versatile unit compatible with most battery types, including standard, AGM, lithium (LiFePO4), and deep-cycle batteries. Designed for dependability, the Craftsman CMXCESM258 boasts 12A Rapid Charge and 3A Maintainer modes. Fully automatic, this microprocessor-controlled charger will automatically detect a connected battery's voltage and adjust the amperage rate and charge. Other features include reverse hook-up protection to prevent the charger from operating if the clamps are reversed, bad battery indication, a digital display, LED indicators, and push-button controls. A six-foot power cord and 6-foot battery cables give users a comfortable 12-foot reach for easier hook-up in your garage. The unit is backed by a two-year limited warranty.