NOVELTY - Battery comprises: a first portion (22) including a substrate (32) having formed on it a thin-film current collector and a thin-film anode electrode material having a highly porous microstructure provided by a physical vapor deposition process; a second portion (24) including substrate having formed on it a thin-film current collector and a thin-film cathode electrode material having highly porous microstructure provided by the physical vapor deposition process; and a separator (26) placed between first and second portions to separate anode electrode material from cathode electrode material.    USE - The battery is useful in e.g. cell phones, personal digital assistants and laptop computers, flat photovoltaic arrays, and high power prismatic or wound cells which power a large variety of devices including vehicles.    ADVANTAGE - The battery: creates microscopic footprints; can be integrated directly into micro-electromechanical system (MEMS) devices at the time of manufacture, thus eliminating additional process steps; is small and lightweight enabling creation of autonomous and remote sensor networks; overcomes the energy and power limitations of the past MEMS devices; enables widespread utilization of MEMS devices for creating wireless sensor networks for environmental or bio-medical applications; provides high gravimetric and volumetric energy and power and Faradic efficiency superior to commercial batteries; has low power leakage due to high precision manufacturing; is compatible with solid thin-film electrolyte or liquid or gel solutions of electrolyte; is capable of hermetic sealing; and can be scalable to macroscopic battery size.    DETAILED DESCRIPTION - Battery comprises: a first portion (22) including a substrate (32) having formed on it a thin-film current collector and a thin-film anode electrode material having a highly porous microstructure provided by a physical vapor deposition process; a second portion (24) including substrate having formed on it a thin-film current collector and a thin-film cathode electrode material having highly porous microstructure provided by the physical vapor deposition process; and a separator (26) placed between first and second portions to separate anode electrode material from cathode electrode material, where first portion is coupled to second portion. An INDEPENDENT CLAIM is also included for a micro-architectured battery (12) comprising a first micro-architectured cell coupled to at least one additional micro-architectured cell(s).    DESCRIPTION OF DRAWING(S) - The figure shows a section view of a micromachined battery.    Micro-architectured battery (12)    First portion (22)    Second portion (24)    Separator (26)    Substrate (32)