NOVELTY - The fuel source comprises chemical hydride pellets (304) positioned in stacks, a flexible, porous, liquid water impermeable, hydrogen and water vapor permeable membrane (308) in contact with and partially surrounding each chemical hydride pellet, a porous metal hydride pellet (306) positioned between each chemical hydride pellet, spacers positioned between each pellet, air gaps (302) between pellets, a perforated enclosure (312) surrounding the chemical hydride pellets, and a liquid water impermeable, hydrogen and water vapor permeable membrane or particulate filter.    USE - The fuel source is useful for an electrochemical cell such as hydrogen fuel cells, and for supplying fuel to a combustion engine, to a heating device, to a cooling device such as a device operating with a Kelvinator type of refrigeration cycle, to a flame for lighting, to a flame as part of an analytical instrument, and to a flame in a cutting or welding torch and for other devices.    ADVANTAGE - The fuel source allows higher average rate of hydrogen generation capacity and increased extracted energy by providing a controlled porosity fuel structure thus maintaining a low gas diffusion resistance throughout the discharging process.    DETAILED DESCRIPTION - The fuel source comprises chemical hydride pellets (304) positioned in stacks, a flexible, porous, liquid water impermeable, hydrogen and water vapor permeable membrane (308) in contact with and partially surrounding each chemical hydride pellet, a porous metal hydride pellet (306) positioned between each chemical hydride pellet, spacers positioned between each pellet, air gaps (302) between pellets, a perforated enclosure (312) surrounding the chemical hydride pellets, and a liquid water impermeable, hydrogen and water vapor permeable membrane or particulate filter positioned between the chemical hydride pellets and the enclosure. The metal hydride comprises ab5 compounds, ab2 compounds, ab compounds, complex alloys, intermetallic compounds and/or solid solution alloys.    DESCRIPTION OF DRAWING(S) - The diagram shows a cross-sectional view of a fuel source.    Air gap (302)    Chemical hydride pellets (304)    Porous metal hydride (306)    Liquid water impermeable, hydrogen and water-vapor permeable layer (308)    Perforated enclosure. (312)