Charge your throw-away alkaline batteries up to 10 times. Up to 80% 1st time with diminishing capacity on each additional charge. Specifications For Charging 1-4 batteries Ni-Cd / NiMh / Alkaline Automatic conditioner for NiCd to prevent memory effect and prolong cell life. Cut-off function, so that cells can be safely charged at the fast charge rate of this charger. Recharges batteries in Single or Group as the ULG4UNIV microprocessor monitors each charging bay individually. Individual 10 hr maximum timer control for overcharge protection . Has both LED and LCD state of charge display.