NOVELTY - Fuel supply comprises: liquid storage area that includes liquid reactant (610); reaction area (400) that includes solid reactant (500), where liquid reactant is pumped into reaction area so that liquid reactant reacts with solid reactant to produce reaction components (830); product collection area (800) that receives reaction components; barrier that separates liquid storage area from product collection area and moves to increase product collector area and decrease liquid storage area; and container with interior volume encloses reaction area, liquid storage area and product collection area.    USE - The fuel supply is useful for fuel cell (claimed) or fuel cell stack which is used in power portable consumer devices comprising laptop computers, cell phones, and portable media players, power medical devices, heating/cooling devices, vehicles, as conventional battery and other applications that requires power source.    ADVANTAGE - The fuel supply: provides barrier that moves simultaneously increase waste product space and decrease reactant space as reactants are consumed to generate fuel; minimize required size of fuel supply cartridge, thus majority of cartridge space is used at all times; can be easily integrated into consumer devices, portable consumer devices and is disposable; provides desired fuel and containing both reactants and waste products in single container; does not require no additional components (waste container or liquid supply); provides reactant generates desired fuel; utilizing container that mechanically protects contents (reaction area, liquid storage area and product collection area), provide fixed volume for fuel generation, corrosion resistant, liquid impermeable and heat resistant; utilizing barrier that is impermeable to fluids and gasses; and provides liquid reactant that functions to generate fuel comprising hydrogen gas.    DETAILED DESCRIPTION - Fuel supply comprises: a liquid storage area that includes a liquid reactant (610); a reaction area (400) that includes a solid reactant (500), where the liquid reactant is pumped into the reaction area so that the liquid reactant reacts with the solid reactant to produce reaction components (830); a product collection area (800) that receives the reaction components; a barrier that separates the liquid storage area from the product collection area and moves to increase the product collector area and decrease the liquid storage area as the liquid reactant is pumped from the liquid storage area and the reaction components are transferred into the product collection area; and a container with an interior volume that encloses the reaction area, liquid storage area, and product collection area. An INDEPENDENT CLAIM is also included for the fuel supply (II) comprising the container with an internal volume and a product outlet, where the container is fluidly sealed except for the product outlet, and the barrier that divides the internal volume into a first volume and a product collection volume that is fluidly coupled to the first volume, where the first volume includes a liquid storage area containing a liquid reactant and a reaction area containing a solid reactant, a liquid dispenser coupled to the solid reactant and fluidly coupled to the liquid reactant, where the liquid dispenser pumps the liquid reactant to the solid reactant surface to produce reaction components that flow into the product collection volume, the barrier inversely varies the first volume and the product collection volume as the reaction components flow into the product collection volume.    DESCRIPTION OF DRAWING(S) - The figure shows front and angled view of the fuel supply in operation.    Reaction area (400)    Solid reactant (500)    Liquid reactant (610)    Product collection area (800)    Reaction components (830)