Alkaline fuel cell (AFC) Direct borohydride fuel cell (DBFC) Direct carbon fuel cell (DCFC) Direct-ethanol fuel cell (DEFC) Direct methanol fuel cell (DMFC) Electro-galvanic fuel cell (EGFC) Flow Battery (RFC) Formic acid fuel cell (FAFC) Metal Hydride fuel cell (MHFC) Microbial Fuel Cell (MFC) Molten-carbonate fuel cell (MCFC) Phosphoric-acid fuel cell (PAFC) Photoelectrochemical cell (PEC) Proton exchange membrane fuel cell (PEMFC) Protonic Ceramic Fuel Cell (PCFC) Regenerative fuel cell (RFC) Solid-oxide fuel cell (SOFC)