fuel cell A fuel cell is an electrochemical cell that converts the chemical energy of a fuel (often hydrogen) and an oxidizing agent (often oxygen) into electricity through a pair of redox reactions. Fuel cells are different from most batteries in requ ...

is an electrochemical energy conversion device. Fuel cells differ from

batteries Battery most often refers to: * Electric battery, a device that provides electrical power * Battery (crime), a crime involving unlawful physical contact Battery may also refer to: Energy source *Automotive battery, a device to provide power t ...

in that they are designed for continuous replenishment of the reactants consumed. This is a partial list of companies currently producing commercially available

systems for use in residential, commercial, or industrial settings. Fuel cell systems from these manufacturers are currently being used to generate AC or DC electricity,

heat In thermodynamics, heat is defined as the form of energy crossing the boundary of a thermodynamic system by virtue of a temperature difference across the boundary. A thermodynamic system does not ''contain'' heat. Nevertheless, the term is al ...

, water, or any combination of the three.

References

{{reflist Fuel cells Hydrogen