NOVELTY - A fuel source (402) comprises a chemical hydride; and at least one reactive metal source selected from a reactive metal and/or a reactive metalloid. The chemical hydride and reactive metal source comprises a pellet. The pellet is substantially in the form of a cylinder, disc, cube, prism or sphere. The fuel source comprises geometric features. The geometric features comprise longitudinal channels, radial channels, grooves, concave features or convex features.    USE - As fuel source used in electrochemical cell system; for generating hydrogen (claimed); also used in portable electronic devices.    ADVANTAGE - The pellet density inside the fuel container is decreased, leaving open voids, this achieves simply loading loose powder or small chunks of chemical hydride into the fuel container and leaving sufficient void space, thus created voids and channels improves utilization efficiency and the hydrogen production rate; and reduces total quantity of chemical hydride contained within a housing of a given volume and consequently the quantity of hydrogen which can be generated from that fuel.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for following:    (1) making a fuel source involving contacting a chemical hydride and with at least one reactive metal and/or reactive metalloid;    (2) a method of using a fuel source involving reacting a fuel source with a reactive solvent, sufficient to generate hydrogen and by-products; and reacting the by-products and solvent with the reactive metal and/or reactive metalloid sufficient to generate hydrogen. The reactive solvent comprises water, and by-product comprises a hydroxide compound; and    (3) an electrochemical cell system comprising a fuel source including a chemical hydride; at least one reactive metal source selected from reactive metal and/or reactive metalloid; and at least one electrochemical cell, configured to utilize the fuel generated from the fuel source for operation.    DESCRIPTION OF DRAWING(S) - The figure shows block flow diagram of method of using a fuel source.    Fuel source (402)    Solvent (403)    First hydrogen (406)    By-product (408)    Second hydrogen (412)