NOVELTY - Enhanced heat conductive device for a supply device for use with a hydrogen source has an expandable metal shell of specified configuration; at least one expandable rib integrally formed with the metal shell; and a pressurized bottle which, when inserted through an inner compartment of a receiving chamber, forces the metal shell to expand such that the shell is in close contact with the bottle.    USE - The enhanced heat conductive device is used in a supply device for use with a hydrogen source (claimed) for a fuel cell.    ADVANTAGE - The invention allows close contact between the hydrogen source and the enhanced heat conductive device, thus enhancing heat transfer rate from a heat source to the hydrogen source to heat the hydrogen source and to allow thorough endothermic reaction of the metal hydride in the hydrogen source, and effectively discharging the hydrogen at a fixed pressure and while being heated under an evenly heated state.    DETAILED DESCRIPTION - Enhanced heat conductive device for supply device for use with hydrogen source comprises:    (i) an expandable metal shell (12) configured to a columnar configuration;    (ii) at least one expandable rib (14) longitudinally extended along and integrally formed with the metal shell; and    (iii) a pressurized bottle which, when inserted through an inner compartment of a receiving chamber, forces the metal shell to expand such that the shell is in close contact with the bottle.    The metal shell has an inner diameter which is slightly smaller than the outer diameter of the pressurized bottle.    An INDEPENDENT CLAIM is also included for a supply device for use with a hydrogen source, which comprises:    (a) at least one pressurized bottle filled with metal hydride and including a gas discharge valve device provided at its port end;    (b) an outer casing defining a receiving chamber;    (c) an expandable metal shell;    (d) at least one quick connection provided on the outer casing to connect the gas discharge valve device of the pressurized bottle received in the inner compartment for activating the gas discharge valve device to an open position;    (e) a first seal between the first end of the outer casing and the expandable metal shell; and    (f) a second seal between the second end of the outer casing and the metal shell.    DESCRIPTION OF DRAWING(S) - The figure is a perspective view of the enhanced heat conductive device.    Metal shell (12)    Rib (14)