I haven't seen this type of AA box so I thought I'd share. These were made for Uxcell 14x9mm (9x9 with tab) and 24x11mm spring plates. The plates fit into a channel and are a tight fit. I had to tap them in using a screwdriver as a hammer. I recommend checking the plate polarity before installing, as removing might be difficult. I also recommend, highly, soldering the wires on the single plates BEFORE installing as the box could melt. Even though the tab doesn't have a hole, I had no problem getting a good solder joint.
The length is 62mm and can be shortened to 60mm but it's a tight fit and puts some strain on the box
I used PETG filament at 40% infill and they seem strong enough to hold up well. I made boxes for 1,2,3,4, and 6 batteries and I could make other sizes.