The GP 11A 6V Alkaline battery is manufactured by GP Batteries and is part of the GP High Voltage range. The tiny 6 volt GP11A battery is also known as a number of different part numbers from various other manufacturers. This GP 11A Super Alkaline battery is equivalent to and replaces other types or part numbers including A11 CA21 MN11 L1016 CN11A. Each battery comes individually packaged on a single blister card. Dimension : Height 16.5mm Diameter 10.22mm.