Edited 2.7.18.Added AA version with tapered walls to take greater range of battery diameters. Still working on AAA taper version.
3.7.18 AAA taper walls version added. Should fit most batteries now. If not, adjust by scaling up or down.
Apparently there is a risk of fire if batteries are not stored properly. I was sorting all my batteries and decided I needed something to properly store them.
I designed these simple bands and then checked to see if there were any design already uploaded.
I was surprised to see several, but this is probably the simplest and most compact.
It is also great for holding the batteries to check terminals for charge status.
Unfortunately, there is variation in battery diameters and some may be too tight.
I am working on a solution to the problem and hope to upload a revised version soon.
I have one for 12 AAA s and another for AAs.
Each should print in about 20 mins.