Ther MAC ET series of battery chargers were designed for flooded lead acid batteries used in floor care equipment.Its overall simplicity, method of operation and trouble-free performance makes the ET charger attractive to every type of equipment user. To operate after the charger is connected to the battery, the user simplyplugs the AC cord into the wall. thats all there is to it. The charger not only immediately starts charging the battery, but also monitors the battery condition determining the proper charge requirements and automatically tapers the rate of charge to provide a proper finish to maximaze battery life. DC disconnect is not required to reset circuit.