(03-16-2015, 04:29 AM)KumaChan Wrote: its a AA battery adaptor. It allows you to run an AA battery where a C cell used to be.Like these.
There is sometimes a slight issue with these in that they can tend to stop the positive terminal of the AA battery sticking out far enough to make good contact with the metal in the battery housing (engine, tender, etc). A little fettling soon sorts it out though.