fun fact: the uk tv license rules say im allowed to watch TV on my laptop when im at uni, but ONLY IF said laptop is not currently plugged into the wall
@mynotaurus What if there's an isolation transformer or a UPS between the mobile device and the mains?
Edit: What if you convert water into hydrogen using mains power and move the tank to a hydrogen fuel cell that powers the mobile device? Is it still legally mains power?
Edit 2: What if you mined uranium using rechargeable tools recharged in your dorm room and operated a nuclear reactor there to power your tablet?