I had designed and made this https://www.thingiverse.com/thing:4813000 for my new Xbox wireless headphones. I have very little desk space as I am moving so I thought and designed a desk mount battery holder https://www.thingiverse.com/thing:4836350 inspired by https://www.thingiverse.com/thing:872226. So while in fusion 360 I was thinking someone else may benefit from my dove tail so that's why this is here.

Added version 2 (I added a slight [2.5mm] chamfer to both parts to help with bridging while printing).