NOVELTY - A rechargeable battery cell (1) has anode and cathode film layers; a film membrane layer immersed in an electrolyte; and barrier film layer(s) between the anode and cathode film layers. The cell is wound into a coil having integrated anode current collector film layers between the anode layer and the membrane layer at different coil winding locations, and integrated cathode current collector film layers between the cathode layer and the membrane layer at different coil winding locations. The two current collector film layers are separated by polarity, stacked, and compressed outside the coil.    USE - For powering a modern mid-size automobile for a distance of up to 1500 km.    ADVANTAGE - The rechargeable battery cell can be recharged 500 times (every 1500 km), eliminates air pollution, and solves many of the other environmental problems associated with an internal combustion engine. The cell generates high-rate capacity for powering the electrical motor in the modern mid-size automobile. The cell is more economical, preserves the environment in a better way, is safer for the public, reduces human health concerns, and reduces consumption of natural resources.    DETAILED DESCRIPTION - Rechargeable battery cell comprises:    (a) an anode film layer;    (b) a film membrane layer immersed in an electrolyte;    (c) a cathode film layer; and    (d) barrier film layer(s) between the anode and cathode film layers.    The cell is wound into a coil having integrated anode current collector film layers oriented between the anode film layer and the electrolyte film membrane layer at different coil winding locations, and integrated cathode current collector film layers oriented between the cathode film layer and the electrolyte film membrane layer at different coil winding locations. The anode film current collectors each contact greater than or equal to 10% area of one coil winding of the cells anode film. The cathode film current collectors each contact greater than or equal to 10% area of one coil winding of the cells cathode film. The anode current collector film layers and the cathode current collector film layers are separated by polarity, stacked, and compressed outside the coil. Serial and/or parallel arranged cells power an electrical motor in an automobile, including a Hybrid alternative automobile type. INDEPENDENT CLAIMS are included for:    (i) a two-circuit electromagnetic relay;    (ii) an arrangement of circuit elements (logic); and    (iii) a battery management method.    DESCRIPTION OF DRAWING(S) - The figure is a side view of the rechargeable battery cell installed between a rear wheel-cases, in proportional scale of 1:1, of a modern automobile body profile.    Rechargeable battery cell (1)