Black battery pack replaces any Cheeper Keeper or AXT-Electronic circuit board battery pack. Made by Keystone Electronics, a high quality electronic component company in the USA, and custom fitted with specific pin connectors. For use with any VSB printed circuit board made in Germany.
Easy to install. Black wire to pin 1A, and red wire to pin 2A. Or, alternatively, because your unit comes with two fuses, black wire to pin 1B and red wire to pin 2B.