Schumacher SCF-8020A 2/10/20/80A Automatic Battery Charger with Engine Start Microprocessor controlled to automatically adjust the amperage rate to charge and maintain Multi-stage charging for added precision, safety, and battery life Float mode monitoring automatically maintains optimum battery charge Charges 12V Standard, Gel, AGM and deep-cycle batteries Reverse hook-up protection ensures charger will not operate if clamps are reversed