But those batteries wear eventually out.

When that happens, bring on the fuel cell.

The fuel cell takes hydrogen and transforms it into electricity, creating no sound and no pollution.

Larry Hager of Avista Labs says "the byproduct is H2O. So, we get a little bit of water out of the system and a little bit of heat, as well."

The military says smaller, portable, fuel cells would be a big boost on the battlefield.

Dr. Mike Binder of the Dept of Defense says, "Soldiers have a lot of communications equipment with them, the modern soldier has electronics, sometimes even air conditioning in their suits, that they have to have when they're out there."

Right now fuel cells are being tested by the FAA to provide backup power for aviation communications systems.

The fuel cells at a local communication center are enough to power the entire rack of radios just with a little bit of hydrogen.

Right now the FAA and the military are using fuel cells to power a radio transmitter site, but there are all kinds of applications they're hoping for in the future.

Boeing is looking at fuel cells to power the air conditioning and electrical circuits on it's airplanes.

Trucking companies are looking at fuel cells to operate power and heating systems in the big rigs so they don't have to keep their diesel engines running.

In a few years, you could even see fuel cells in the home.

Avista Labs CEO Mike Davis says, "I think in 5 years it's a very different world and you'll see fuel cells actually on laptop computers."

Eventually, there's talk of fuel cells in cars, doing away with pollution, and doing away with a dependence on oil.