Hey,

I've designed a small, attachable 18650 container here.

This model is intended to power a longboard with underbody lighting without the drawbacks of a fixed battery!

Simple M3 threaded inserts are melted into the holes of the box... e.g., from Ruthex

Here are the links:

Threads

18650 Holder

Pictures of the finished longboard will be uploaded later…

Have fun printing!