Re: "my backpack can weigh between 8 and 14kg"
Richard 12>Consider what happens if the isolation fails and the case or output USB shell becomes live.
Explain that mechanism for me. Because we can "consider" that for any plastic cased low voltage device plugged into the mains via a power supply. Consider and then see it just isn't plausible and definitely not the reason at all that a laptop supply is earthed.
Biting the hand that feeds IT
