NOVELTY - A fuel cartridge (104) comprises reaction units, each of the reaction units comprising first reactant and second reactant separated from each other, and heating apparatus (112), where the heating apparatus is capable of making the first reactant and the second reactant separated from each other contact with each other to generate hydrogen gas.    USE - As fuel cartridge (claimed), for power generation.    ADVANTAGE - The fuel cartridge when used in hydrogen storage method enables to actively control quantity of hydrogen gas in the fuel cartridge to achieve a high hydrogen gas storage rate. When the electrical quantity of the fuel cell stack is detected to be insufficient, the heating apparatus in one of the reaction units or the heating apparatus in more of the reaction units can be activated based on power consumption of the fuel cell stack to conduct electricity and perform heating, such that the separated first and second reactants contact with each other to perform the chemical reaction by which an adequate quantity of hydrogen gas may be generated and supplied to the fuel cell stack. Thus, the amount of the hydrogen gas generated in the fuel cartridge can be actively controlled without being wasted.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for hydrogen storage method involving providing fuel cell system (100) comprising fuel cell stack (102) and fuel cartridge having reaction units (108); detecting electric quantity of fuel cell stack; performing first hydrogen generation reaction based on power consumption of fuel cell stack to generate hydrogen gas when electric quantity of fuel cell stack is insufficient, where first hydrogen generation reaction involves controlling at least one of the heating apparatus in at least one of reaction units to perform heating, such that the first reactant and second reactant in at least one of reaction units contact with each other to generate the hydrogen gas; and supplying fuel cell stack with hydrogen gas generated by performing the first hydrogen generation reaction.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of schematic view illustrating arrangement of fuel cell system.    Fuel cell system (100)    Fuel cell stack (102)    Fuel cartridge (104)    Reaction units (108)    Hydrogen gas channel (110)    Heating apparatus (112)