An article from the 2007 Environmental Health Perspectives journal features an innovative, portable hydrogen fuel cell battery. A company called Jadoo aimed its hydrogen fuel technology at small devices that can be powered in the 100- to 500-watt range. The first real-world application of this hydrogen battery was applied to broadcast cameras, replacing the heavy and cumbersome brick batteries that dominate the craft.
Hydrogen fuel cells are batteries that can be recharged and reused over and over. Two electrodes are placed in an electrolyte solution, and a voltage is generated when hydrogen chemically reacts with the oxygen in the air.
Nickel-hydrogen batteries provide an effective bridge between nickel composite batteries and hydrogen fuel cells. The technology borrows something from each one. The positive electrode is nickel oxide, similar to a nickel-cadmium battery, but the negative electrode is pressurized hydrogen.