As per this Q&A: https://www.robotevents.com/VRC/2018-2019/QA/42 it is legal to power a V5 Controller using an external battery pack.
This seems to imply that R14 b iii does not always apply. If this is correct, when does R14 b iii apply? Also, what is considered an acceptable external power source for the joystick? Here are a few examples, but more general language would be appreciated:
- USB battery pack
- USB wall plug
- Laptop
- Tablet
- Phone
- Solar (for trickle charging)
To be clear, the joystick would not be modified in any way; all devices would be external and power the joystick only through the micro USB port.