|A 2-cell lipo battery (1200 mAh)|
|UBEC with 5V or 6V output (selectable)|
And finally, I just had to make a small JST-DC coaxial adapter cable. I think the DC connector I used is a type M (2.1mm inside diameter).
|JST to DC coaxial cable|
The output reads about 5.2V which is very close to the output of the wall power supply, and the Oculus is pretty happy with it!
It's important not to power the Rift with an empty battery as the voltage would be too low. To detect that, you can use a low-voltage alarm plugged into the charge lead of the battery. Something like this:
So all this works OK, but I'll probably go for a simpler solution like an USB-to-DC cable as mentionned on the Oculus forums. It'll draw power from a spare USB port on the laptop/computer. A computer is necessary anyway for producing the images in the first place.