NOVELTY - A fuel cartridge (100) consists of container (102) having interior volume and opening, and multi-layer package material at the opening of the container containing fuel composition (118) within the interior volume. A fuel composition containing hydrogen containing material configured to release hydrogen gas when heated is disposed within the interior volume of the container. The multi-layer package material consists of conductor layer (124) proximate the fuel composition, and polymer layer distal the fuel composition.    USE - Fuel cartridge is used to provide hydrogen gas to device e.g. fuel cell battery, and hydrogen consuming devices or appliances.    ADVANTAGE - The fuel cartridge has improved efficiency and recyclability, and can be removably inserted into the hydrogen generator, and allows reuse of the hydrogen generator and replacement of spent fuel cartridges by the user of the hydrogen generator.    DETAILED DESCRIPTION - A fuel cartridge consists of container having interior volume and opening, and multi-layer package material at the opening of the container containing fuel composition within the interior volume. A fuel composition containing hydrogen containing material configured to release hydrogen gas when heated is disposed within the interior volume of the container. The multi-layer package material consists of conductor layer which proximate the fuel composition, and polymer layer which distal the fuel composition. At least one portion of the conductor layer is a preformed portion (128). INDEPENDENT CLAIMS are included for the following:    (1) hydrogen generator (400), which consists of housing (414), holder (402) disposed within the housing and configured to retain fuel cartridge, heater assembly (406) disposed within the housing, and a punch (408) disposed within the housing and thermally coupled to the heater assembly, and configured to move between a retracted state and a puncture state; and    (2) method for generating hydrogen gas, which involves inserting fuel cartridge into hydrogen generator, puncturing the multi-layer package material by moving the punch from a retracted state to a puncture state, where the puncture state of the punch provides heat conductive path from the heat source to the surface of the fuel composition through the punch, and applying heat to the fuel composition through the punch to release hydrogen gas.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the fuel cartridge along A-A line.    Fuel cartridge (100)    Container (102)    Fuel composition (118)    Conductor layer (124)    Preformed portion (128)    Hydrogen generator (400)    Holder (402)    Heater assembly (406)    Punch (408)    Housing (414)