Triple A (AAA) Holder (Untested)
(NOTE: Pic is from my AA holder) That said, this is just a triple A holder I use for my rechargeables to keep track of which ones are good and which are dead. This was one of my first dual extrusion designs and prints, so that explains the amount of black that bled into the red. I've also included the sketchup file if you'd like to edit it. I have scaled the model in sketchup to make 10.5mm holes which match a AAA battery. I have no need for it so I haven't printed and tested it myself, but had a comment about wanting one, so figured i'd post it. According to sketchup, it should be scaled perfectly...