TECHNOLOGY FOCUS - ELECTRICAL POWER AND ENERGY - Preferred System: In the magnetic field coil system, the electrically-conductive thin-film battery cell comprises: (a) a supportive substrate structured and arranged to support: (i) a cathode current collector; (ii) in operative relation with a cathode current collector, a cathode; (iii) in operative relation with a cathode, an electrolyte structured and arranged to support the electrochemical process; (iv) in operative relation with the electrolyte, an anode; and (v) in operative relation with the anode, an anode current collector; (b) where the supportive substrate comprises a substantially flexible ribbon having a longitudinal length and a maximum width; and (c) where the longitudinal length is substantially greater than the maximum width. The electrically-conductive thin-film battery cell comprises a lithium-based chemistry. The magnetic-field-producing battery-coil comprises the electromotive device structured and arranged to produce at least one useable mechanical force. In the motor-battery system, the battery comprises a battery electrode structured and arranged to conduct a flow of such electrical current, and where interaction between the flow of electric current and the magnetic field produces electromotive force acting substantially directly on the battery electrode. The motor-battery system further comprises a vehicular wheel structured arranged to provide rolling vehicular motivation using the mechanical force. The magnetic field source comprises at least one Halbach array. In the power system: (a) the electrochemical energy source comprises an electrolytic layer structured and arranged to support such an electrochemical process; (b) the electrode comprises an anode layer and a cathode layer; (c) the anode layer and the cathode layer are structured and arranged to be in interactive relation with the electrolytic layer; and (d) the anode layer, the cathode layer, and the electrolytic layer are formed substantially by a thin-film deposition process. In the power system: (a) the electrochemical energy source comprises discrete current-producing cells, each discrete current-producing cell is structured and arranged to produce an electrical potential from an electrochemical process and a magnetic force in the presence of a magnetic field; (b) the discrete current-producing cells comprises a substantially radial arrangement; and (c) a substantially radial arrangement comprises a central point of radial symmetry. In the power system: (a) the magnetically-conductive substrate comprises a disk-shaped member having a center point substantially coincidental with the central point of radial symmetry; and (b) the discrete current-producing cells are arranged substantially symmetrically at the center point. In the power system: (a) the disk-shaped member comprises a substantially planar support surface structured and arranged to support the discrete current-producing cells; and (b) the discrete current-producing cells preferably comprises a stacked organization preferably aligned substantially perpendicular to the substantially planar support surface. In the power system: (a) a magnetic field source is structured and arranged to produce such a magnetic field; (b) the positioner is structured and arranged to position the disk-shaped member and the magnetic field source to provide a direct interaction of the electrochemical energy source with the magnetic force; (c) the positioner comprises: (i) a magnetic field aligner structured and arranged to align the line of magnetic flux, of a magnetic field, in a first direction; (ii) an electric-current aligner structured and arranged to align a flow of electrical current conducted by the electrode, in a second direction substantially perpendicular to a first direction; and (iii) a motion enabler structured and arranged to enable relative motion between the electrochemical energy source and the magnetic field source; (d) the interaction force produces such relative motion; and (e) the useable mechanical force is extractable from such relative motion. In the power system: (a) the motion enabler comprises a rotator structured and arranged to allow rotation at a rotational axis; (b) a rotational axis comprises an orientation non-parallel with a third direction; and (c) an interaction force produces a rotational torque at the rotational axis. The magnetic field source comprises an electromagnetic field generator or a permanent magnet. The power system further comprises: (a) a current controller structured and arranged to control movement of an electric current within the electrode; and (b) where control of the electric current within the magnetic field controls the level of the interaction force.