The Cal-Van Tools ChargeSmart, No. 543, is designed to safely charge and maintain 6V and 12V conventional, maintenance-free and 12V AGM batteries. The 100-percent true recharge extends battery performance and life in light to heavy duty applications such as motorcycles, jet skis, campers and boats. This charger features a three-position voltage selector switch, a built-in timer, spark-free and reverse polarity protection and a three-LED indicator display. The ChargeSmart offers a pre-qualification battery test, constant current bulk charge, absorption finish charge, and maintenance and float charge.