NOVELTY - A motor-battery system (100) relating to motivating a motor battery equipped vehicle comprises: (a) a magnetic field source (106) structured and arranged to produce a magnetic field; and (b) a battery structured and arranged to produce electrical current from an electrochemical process; (c) where the magnetic field source and the battery are structured and arranged to convert an electromotive force to the mechanical force usable to motivate a motor-battery equipped vehicle.    USE - The motor-battery system, magnetic field coil system, and power system are useful for converting self-generated electrical current to mechanical power.    ADVANTAGE - The motor-battery system combines essential electric motor and electrochemical battery functions into a common set of structures, thus reducing overall mass of the system.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for:    (1) a magnetic field coil system comprising: (a) a magnetically conductive core structured and arranged to conduct a magnetic field; (b) an electrically-conductive thin-film battery cell structured and arranged to produce electrical current derived from an electrochemical process; (c) where the electrically-conductive thin-film battery cell is wound around the magnetically conductive core to form a magnetic-field-producing battery-coil; and (d) where such electrical current is usable to generate a magnetic field within the magnetic-field-producing battery-coil; and    (2) a power system related to the production of an useable mechanical force using a magnetic field source structured and arranged to produce a magnetic field having lines of flux extending in a first direction, comprising: (a) a magnetically-conductive substrate to provide magnetically-conductive support; (b) deposited on the magnetically-conductive substrate, an electrochemical energy source structured and arranged to produce an electrical potential from an electrochemical process; (c) a Halbach array, structured and arranged to provide a magnetic field source; and (d) a positioner structured and arranged to position the electrochemical energy source in a position of interaction with a magnetic field; (e) where the electrochemical energy source comprises an electrode structured and arranged to conduct a flow of electrical current, derived from the electrical potential, in a second direction perpendicular to such first direction; (f) where interaction between the electric current and the magnetic field produces an interaction force acting substantially directly on the electrochemical energy source in a third direction perpendicular to both the first direction and the second direction; and (g) where action of the interaction force on the electrochemical energy source produces an useable mechanical force.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of a single motor-battery cell of a motor-battery system.    Single cell motor-battery (102)    Energy-source component (103)    Electrochemical cell (104)    Magnetic field source (106)    Electrolyte (108)    Electrode laminations (110)    Cathode plate (114)    Control circuit (116)    Current flow direction (118)    Magnetic flux line (119)    Magnetic force line (121)