Update: Choose carefully, there are 2 kind of batterys on the market - a smaler one, wich is usualy sold with the ONE R - and a bigger one, wich is part of the ONE RS. If you are unsure - print the bigger one.
Just a modification of the original idea.
I modified the lid because i wanted to limit the moving space of the camera, battery and sd-card. Also modified the place for the micro sd cards - before they fell out when you turned the case upside down - now all parts have ~1mm to move and stays in place.