The energizer 1 hour charger allows fast charging of up to 4 aa or aaa ni mh batteries in 1 hour or less the charger has an led charge light that shows when batteries are charging and a sophisticated charge indicator displays how charged the batteries are a bad battery alert displays when the battery cannot be charged for convenience the charger features automatic shutoff and will stop the charging process once the batteries are charged the 1 hour charger features polarity protection which preve