UPDATE #2: Add a box with a marking (v-cutout) in one direction on all cells. This allows for determine orientation for empty or full battery without having to paint the box.
UPDATE: Added longer box lid to fit larger sized batteries like GNB 300mAh. Larger lid can accommodate batteries of ~66mm of length.
This is 1S Lipo battery box that hold 16 batteries.
The design is based off of the Tiny Whoop Battery Holder
I loaded this design and used the base dimensions of the battery holders.
I did tweak the design so it fit the batteries. It is a little loose but is good if you have tape wrapped around the batteries to hold them in place better on your Tiny Whoop.
The battery has two positions to allow you to keep track of which one is fully charged or discharged. I paint one side a different color so I can keep track.
The design is built on the using minimal material. The thickness of the wall are just over 0.4mm between batteries, the outside wall is 0.8mm.
I can create other sizes if people so desire.