Black & Decker 40 Amp high frequency interface smart battery charger is designed to automatically select the ideal conditions for the battery used in the boat, lawnmower, car, golf cart and more. The technology has high rates of load frequency up to two times faster than conventional chargers and allows a pure DC output to provide a stable support. This charger has a Patented alternator check indicates condition of the alternator and hook to reverse the protection that prevents damage caused by incorrect terminal connections. It consists of a digital LED screen that shows the battery voltage and battery reconditioning improves their ability to accept a position. This smart charger