Fuel cell basics
A fuel cell is a device that turns the chemical energy from a fuel into electricity through a chemical reaction with oxygen or another oxidizing agent.
Hydrogen gas is the most common fuel, but alcohols such as methanol are increasingly used.
Fuel cells are different from batteries. They require a constant source of fuel and oxygen to run – but as long as these are supplied, fuel cells can produce electricity continually.
As long as there is fuel in the tank, the fuel cell will be able to produce electricity.