Brians Battery Box Design

This is a battery box for DIY projects.Its for 6 pcs of 18650 cells LiION. Im gonna use this in a DIY bluetooth speaker im building. This is uploaded as a test piece im on vacation and going to print it from my phone. When i get back and see if it fits i might make changes to it. Its made to fit with this battery spacer:https://www.thingiverse.com/thing:1554511