Look, you are correct on one point–the energy comes from batteries (assume you could actually build the car as described (which you can’t–a system capable of generating that much hydrogen and oxygen that could fit in a car–much less be built at a reasonable price, is WAY beyond existing technology) it would be pointless.

Here’s why: whatever else happens, the system will have to end up turning a drive shaft to power the wheels. If you have sufficient battery power to do that, you don’t need the rest of the equipment–just drive the car directly from the batteries. That would be cheaper–less equipment–and more efficient (NO conversion system can be 100% efficient–the whole ” run on water” system willl use more energy than t puts out (second law of thermodynamics).

There are real cars–electric cars–being developed now, by real scientists and engineers. The ones being developed now have performance as good as gas-driven cars. That s REAL technology–not junk science dreamed up by scam artists to defraud people.