Summary

Update April 2020 - I've been learning Fusion 360 so rebuilt this from scratch for practice, the new version should slice better.

This very sturdy battery holder is to go with my Makita DC18RC battery charger mount and allow me to store my batteries on my pegboard. Created using Simhopp's excellent model as a base and edited using Windows 3D Builder! I find this tool excellent for editing existing STL files, you just have to take things one step at a time and re-export each time you make a change.

Featured in this video:
https://youtu.be/wmbR-ubrmfo

I used plastic trim rivets and 8 x 1/2" pan head screws to attach these to the pegboard as these fit nicely. The part is designed with enough clearance for the head of the rivet and the head of the screw, however printer tolerances might mean some minor filing is required. The rivets are expanded by the screws and anchor the part in place. I have a thin metal pegboard and these work fine, they should still work with slightly thicker wood or fibreboard pegboards but I don't have any to test with.

Plastic Rivets:
https://www.google.com/search?ei=HBzvWvbSHInDgAbS0aXgBw&q=6mm+Trim+Panel+Black+Plastic+Rivet&oq=6mm+Trim+Panel+Black+Plastic+Rivet

Base Screws:
https://www.google.com/search?ei=lxzvWrS3I5OJgQbq0K6oBg&q=Screws+%238+x+1%2F2&oq=Screws+%238+x+1%2F2