I have always felt the longer someone needs to explain something, the less reliable what they're saying is.
high amp 12v battery and jumper cables will render it useless. All electronics have a ground, it has rubber tires, so safe to say it grounds to it's own frame. Reverse the charge an fry the CPU.
waste of fucking money
seems a bit more practical
it's literally a ledger.
You and I have a total of 10 dollars
you get 5 I get 5
we then, a week later, compare ledgers and add up our spending plus the money we have on account and it = 10
it's a digital ledger.
that's it.