I wasn't happy with any of the Gridfinity bits I found for AA or AAA batteries, so I decided to make a new one!

They're designed to be snug enough to keep batteries in place in drawers but loose enough for batteries to be easily removed from a storage without needing magnets to hold them down. I removed a lot of material between bodies to reduce the filament usage and printing time, and added some strain relief to the AA bins. I don't personally use magnets for Gridfinity but I included models with spots for 6mmx2mm round magnets on the bottom. The bins are slightly taller than 1U to keep the AA batteries more stable, and it also enables using a second AAA bin to fully enclose 9 batteries if you need to throw them in a bag.

If people like these designs, I'll start expanding them into 1x2 and 2x2 designs as well.