Update 31.05.2024:  Added version with space for velcro straps.

If you ever had an issue finding a battery that was wandering inside a backpack, this may solve your issues. This is a two unit version. I also have 3 unit version - look in my projects.

Fits original FMC bag.

Also, this will help to store batteries in a more organized and protected way.

Printed with 0,3mm layer height, 15% infill. No supports required.

Use CA glue to assemble it. Apply self adhesive velcro tape to secure it inside backpack/photo bag.