Fuel cell
From wikiMHEDA
A fuel cell is an electrochemical device that combines hydrogen and oxygen to produce electricity, with water and heat as its by-product. As long as fuel is supplied, the fuel cell will continue to generate power. Since the conversion of the fuel to energy takes place via an electrochemical process (not combustion) the process is clean, quiet and highly efficient--two to three times more efficient than fuel burning.[1]
