4-AA Battery Holder with 2.5mm Barrel PlugFeatures 4x AA battery holder (series); 8" wires with 2.5mm ID x 5.5mm OD barrel plug (center positive); pagebreak Overview Holds the average, and common, AA battery. This holder attaches to many things by utilizing the screw holes on the bottom. It has a 2.5mm ID cylindrical female barrel plug.
