“The output of a fuel cell is electricity. There is no combustion that produces a jet of hot gases. It’s basically a hydrogen powered battery.”
I’m not an authority on this, but I know race cars have fuel cells, and it’s a way to manage the movement of the liquid fuel in the tank. Maybe this with Hydrogen?
Two very different meanings of the word. In race cars, "fuel cell" refers to a container for liquid hydrocarbon fuels, which is designed to minimize spillage in a high speed crash.
Here, we're talking about a device that combines hydrogen, oxygen, and a catalyst to produce electric current (and heat) without an open flame.