NOVELTY - A hydrogen generator apparatus (A1) comprises a fuel tank (a1), a first disc (b1) and second disc (c1). (a1) Comprise a wicking material, and a fuel fluid in wicking material. (b1) Binds wicking material and comprises a hydrophilic membrane for receiving fuel fluid from wicking material. (c1) Has a porous surface coated with catalyst to form catalyst-coated surface. (c1) Is in close proximity or contact with (b1) yet movable relative to (b1).    USE - for providing electric power source (claimed) to e.g. vehicles or microelectronic devices (such as mobile phone, digital camera, computer etc.).    ADVANTAGE - The hydrogen generator delivers hydrogen stream at a controlled rate to a device such as a fuel cell. The generator has a mechanism that permits relative motions between the two discs for the purpose of adjusting the catalyst-fuel contact areas, and thus provides a system having simplicity, compactness, portability, hydrogen production rate adjustability, reliability, and ability to operate in any orientation. The portable hydrogen gas generator is based on a class of metal hydride solution fuels that is quite stable. Some form of catalyst is needed in order for the hydride-water reaction to proceed at an appreciable rate. As a consequence, this reaction is highly controllable making a reliable way of bringing catalyst into contact with a hydride fuel solution to produce hydrogen at a controlled, but variable rate in response to the output power requirement of a fuel cell    DETAILED DESCRIPTION - A hydrogen generator apparatus (A1) comprises a fuel tank (a1), a first disc (b1) and second disc (c1). (a1) Comprises a wicking material, and a fuel fluid in wicking material. (b1) Binds wicking material and comprises a hydrophilic membrane for receiving fuel fluid from wicking material by a wicking pressure to form fuel fluid-wetted surface. (c1) Has a porous surface and is coated with catalyst to form catalyst-coated surface. (c1) Is in close proximity or in contact with (b1) yet movable. Hydrogen is generated by hydrolyzation of the fuel contacting the catalyst due to contact between fluid-wetted surface and catalyst-coated surface induced by relative motion between (b1) and (c1). An INDEPENDENT CLAIM is included for an electric power source comprising (A1) and a fuel cell to receive hydrogen fuel produced from it.