Anyway the secret to long vr life is external battery banks. Most people have big brick style ones they put in their pocket or something and that can give you dozens of hours which is usually enough for most people. If you have two of them then you can just swap for infinite time in VR.
I have smaller banks that I strap to my ankles/wrist/belt when required that I take on and off to charge. I can keep myself going a while.