The Top Release 1/2AA battery holder for use in tight spaces features easy one-handed battery changes such as between peripheral cards. The battery cover installs, removes and secures the battery in the holder, and fits all 3V and 6V 1/2AA cells sized 13 to 14.5 mm wide x 23 to 25 mm long, alkaline or lithium. Designed for standard PCB spacing and polarization keyed for Apple and Windows PCs, holders are made from UL94V-0 high impact ABS plastic and nickel-plated spring temper stainless-steel contacts.