Technology is increasing our energy needs, but it is also showing in new ways to generate power more effetely with less impact on the environment. One of the most promising options for supplementing future power supplies is the fuel cells. They have the potential to create much more reliable power, with lower levels of undesirable emissions and noise and higher over all efficiency than more traditional power generation systems with existing and projected applications ranging from space craft to private automobiles, large stationary power generator systems to small electronic devices, fuel cells are poised to play an increasingly critical role in meeting the world’s plowing demand for clean, reliable power. Fuel cell is an electrochemical energy conversion device which converts chemicals hydrogen and oxygen to produce electricity by slipping electrons from hydrogen. The hydrogen med is exceeded from natural gun, propane and other common fuel and oxygen is from air.