sam

Oh this is so helpful, I had no idea this existed

Depends on relative to what.

Connected to the wall: it’s AC (alternating current). half the wave is already negative. You can rectify it backwards, apparently. Or, you can use a split phase transformer.

Connected to a really big battery: big inverter just swaps the leads on the battery really fast.

Hold in your hand: negative charge pump. Magic & momentum.

This is really sad.

I want to believe your former friends could be de-eadicalized, but man, i would not envy anybody actively trying to do so.