I really wish I knew how it worked, but many years ago 1973 I worked at a datsun dealer and one of the mechanics there used diodes to make the same type of devise. I bet he wished he had got a patton for it.
I understand what you are saying about diodes, that are simply one way valves for electricity.
As I remember he used 3 or was it 5. anyway he just used diodes. That is why I assumed it had diodes. Could be it also has dilithium crystals, you know the stuff that powered the starship enterprise. lol

I didn't do it, no one saw me do it, you can't prove anything! "Bart Simpson"