NOVELTY - The system (100) has a fuel reservoir (104) for storing fuel and including a refueling port (112) i.e. pressure activated valve. A fuel cell layer (102) is in fluidic contact with the fuel reservoir and includes a flexible wall. A fuel plenum is formed between the fuel reservoir and the fuel cell layer. A system cover (124) is partially surrounded the fuel cell layer. The fuel reservoir comprises a fuel storage material i.e. hydrogen storage material. A current collecting circuit (106) is in contact with the fuel cell layer, and receives and distributes current generated by the cell layer.    USE - Portable or micro-fuel cell system i.e. electrochemical energy conversion device, for producing electricity to a portable electronic device such as cellular phone, satellite phone, laptop computer, computer accessory, display, personal audio or video player, medical device, TV, transmitter, receiver, lighting device e.g. outdoor lighting or torchlights, electronic toy and power tool (all claimed).    ADVANTAGE - The system maintains high energy density, provides sufficient power output and occupies relatively small volume. The system can be operated passively without pumps, valves or heaters and instantly startup without having to rely on any supplemental battery or other power source, thus saving precious energy and electrical device volume. The system ensures that pressure regulator reduces or maintains the pressure in the fuel plenum to a level sufficient for the operation and movement of the fuel cell layer. The system ensures that mechanical binding of the system cover to the fuel reservoir exerts cover pressure on the current collecting circuit toward the fuel cell layer, thus providing efficient contact between the components of the system.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a method for fabricating a fuel cell system.    DESCRIPTION OF DRAWING(S) - The drawing shows an exploded perspective view of a fuel cell system.    Fuel cell system (100)    Fuel cell layer (102)    Fuel reservoir (104)    Current collecting circuit (106)    Refueling port (112)    System cover (124)