Ultralast ULG4UNIV Universal NiCd/NiMh/Alkaline Battery Charger Charge up to 4 batteries at a time of AAA, AA, C and D sizes (9V may only be charged 1 at a time) Charge alkaline batteries up to 10 times with up to 80% first time with diminishing capacity on each additional charge Automatic conditioner for NiCd to prevent memory effect and prolong cell life Ultra-fast 1200mAh household charger has a zero delta cut-off function enabling safely charging Microprocessor monitors each charging bay individually allowing batteries to be charged in groups or singly