VR 18650 battery pack

Headset battery pack to extend wireless playtime. Uses 8 18650 batteries for a roughly 12 hours wireless play time. Was designed to fit the straps for the oculus quest 1, with rivets, but may fit onto other headsets.

There is a bolt on PCB case for an input/output typeC charger. The oculus quest is noted for not charging fast enough to keep the battery topped off through the type c port though, so I actually ended up gutting my quest to remove the internal battery above the forehead and directly hard wired in my 18650 cells, thus the PCB is just used as a charger. Its important to not charge it through the Oculus type c if its in this configuration since the internal oculus battery is a different chemistry that tops off around 4.5V instead of 4.2V and will try to overcharge the 18650s.