This is a 32650 battery cell holder. This a redesign/remix from one I found on thingiverse. It uses the popular Keystone 209 contacts (Amazon or Newark or other places) The one on Thingiverse was just a little too small for my cells that I bought (my cells are more like 32700!) So I made a completely new design using some of the dimensions and style from the original. I've included the single cell and the 4 cell version both with and without mounting tabs. I've also included the fusion 360 file if you want to modify it yourself.
The author remixed this model.