Is the energy loss from charging up the “hydrogen battery” less than the energy loss transporting that electricity through the electrical grid and through a energy losing charging circuit? Hydrogen from electrolysis can be done with electricity generated by a ton of methods. Safe hydrogen management has been successfully achieved. When was the last time a earth shattering explosion has come from hydrogen? Look at the hydrogen used for NASA’s space program. It has come after solving the many problems liquid hydrogen presents. Today, liquid hydrogen is the signature fuel of the American space program and is used by other countries in the business of launching satellites. In addition to the Atlas, Boeing’s Delta III and Delta IV now have liquid-oxygen/liquid-hydrogen upper stages.
Hydrogen with all of its technical problems, has its advantage:
Hydrogen — a light and extremely powerful rocket propellant — has the lowest molecular weight of any known substance and burns with extreme intensity (5,500°F). In combination with an oxidizer such as liquid oxygen, liquid hydrogen yields the highest specific impulse, or efficiency in relation to the amount of propellant consumed, of any known rocket propellant.
In cars. hydrogen will not be ignited to drive pistons. Instead it will go through fuel cells that put out electricity!
My WAG is that it would take as much or more electricity to produce hydrogen as youd use in a battery car, but then you wouldn't have the "advantage" of limiting the peasants' travel which as near as I can tell is the real motivating force behind the governments effort to ram EVs down our throats and up our other orifices.