NOVELTY - The battery comprises an anode, an air cathode, an electrolyte (18), an electric conduit that allows electric current flow between the cathode and the anode, and a device for increasing flow of the oxygen. The anode comprises amorphous silicon as fuel, and the cathode comprises oxygen as an oxidant and a carbonaceous material, where the oxygen is derived from ambient air and the silicon is in a form of a single crystal wafer and a powder. An orientation of the crystal consists of silicon (100) crystal orientation, silicon (111) crystal orientation and silicon (101) crystal orientation.    USE - The battery is useful in an electricity-consuming device, a portable power source (all claimed), an electronic device and a cogeneration system or a stationary power plant for a house and useful for electrically driven or hybrid electric vehicles such as a car, a bus, a forklift, Segway (RTM: Self-balancing personal transportation device), a motorcycle, a mobility scooter, a two- three- or four-wheel scooter and a saddle-ride type vehicle, an autonomous lawn mower, an autonomous pool cleaner, an aircraft, a high altitude aircraft, a rocket and a spacecraft, where the battery is a silicon-oxygen battery, an electrochemical cell device including galvanic cells, electrolytic cells, fuel cells, flow cells and voltaic cells, a lithium-air secondary battery, zinc-air battery, an aluminum-air battery and iron-air battery and the electronic device includes portable telephone, a personal computer, a notebook computer, a portable charging dock, a pager, a personal digital assistant, a digital camera, a gameplayer, a smoke detector, a hearing aid, a portable television, night vision goggles, a portable global positioning system device, a portable lighting device, a toy, a computer peripheral device, an household appliance, a cordless household appliance, an industrial product, a mobile equipment, a robot and a cordless tool such as drill and saw.    ADVANTAGE - The compact and lightweight battery is capable of continuously, efficiently and economically generating electricity without combustion of the fuel and oxidizer in an eco-friendly manner, and has high capacity and energy density and improved lifespan.    DETAILED DESCRIPTION - The battery comprises an anode, an air cathode, an electrolyte (18), an electric conduit that allows electric current flow between the cathode and the anode, and a device for increasing flow of the oxygen. The anode comprises amorphous silicon as fuel, and the cathode comprises oxygen as an oxidant and a carbonaceous material, where the oxygen is derived from ambient air and the silicon is in a form of a single crystal wafer and a powder. An orientation of the crystal consists of silicon (100) crystal orientation, silicon (111) crystal orientation and silicon (101) crystal orientation. The silicon comprises a dopant, which consists of p-type and n-type dopants, and is doped degenerately. The silicon is in a form of an alloy comprising a metal, where an amount of the metal is 1-99 wt.% of the anode. The anode and the cathode comprise a catalyst layer. The cathode has a configuration consisting of a plate, a fibrous, a mesh, a rod, a tubular body, a sintered body and a foamed body. The catalyst accelerates dissociation of molecular oxygen. The device consists of a pump, a fan, a ventilator, a high-pressure container and a tube. INDEPENDENT CLAIMS are included for:    (1) an electricity-consuming device;    (2) a method of powering an electricity-consuming device; and    (3) a portable power source.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic view of a prototype of silicon-air battery.    Silicon-air battery (10)    Polypropylene flask (16)    Electrolyte (18)    Negative terminal (20)    Positive terminal. (22)