There a lot of great things about Windows Mixed Reality, but the batteries in the controllers aren't one of them. Thanks to the wonder of 3D printing, and the ingenuity of one Thingiverse user named Nagorak, we now have a solution in the form of a rechargeable battery and a 3D printed backplate. This guide will take you through the steps you need to get there.
Full story from the WindowsCentral blog...