> I believe that cars use hydrogen in fuel cells, which makes the hydrogen just a component of a different battery technology (the rest of the car still being

> I believe that cars use hydrogen in fuel cells, which makes the hydrogen just a component of a different battery technology (the rest of the car still being electric). Hydrogen can either be used in full cells (for this your statement is correct) or in hydrogen internal combustion engines: > https://en.wikipedia.org/wiki/Hydrogen_internal_combustion_engine_vehicle https://en.wikipedia.org/wiki/Hydrogen_internal_combustion_e...