NOVELTY - Electrochemical battery cell (C1) comprises: an anode current collector configured as a wire having a predetermined cross-sectional profile; an anode layer formed and positioned around at least a portion of the anode current collector; a separator layer formed and positioned around at least some portion of the anode layer; a cathode layer formed and positioned around at least a portion of the separator layer; a cathode current collector formed and positioned around at least a portion of the cathode layer; and an electrolyte establishing ionic conductivity between the anode and cathode layers.    USE - The electrochemical battery cell is useful in a device (claimed) as a power source for implantable or non-implantable medical devices.    ADVANTAGE - The electrochemical battery cell: has no can-type packaging and is essentially open to the environment for both moisture and gas permeability; and is a small scale, easy to utilize, biocompatible, inexpensive, flexible, rechargeable electrochemical battery that provides reliable, stable power for any number of corporeal applications and non-corporeal applications.    DETAILED DESCRIPTION - Electrochemical battery cell (C1) comprises: an anode current collector configured as a wire having a predetermined cross-sectional profile; an anode layer formed and positioned around at least a portion of the anode current collector; a separator layer formed and positioned around at least some portion of the anode layer; a cathode layer formed and positioned around at least a portion of the separator layer that is configured to prevent electrical contact between the anode and cathode layers; a cathode current collector formed and positioned around at least a portion of the cathode layer; and an electrolyte establishing ionic conductivity between the anode and cathode layers. INDEPENDENT CLAIMS are also included for:    (1) an electrochemical battery cell (C2) comprising at least one anode current collector configured as a wire having a predetermined cross-sectional profile, at least one cathode current collector configured as a wire having a predetermined cross-sectional profile, where the cathode current collector is positioned adjacent to the anode current collector and separated a predetermined distance and each of the anode and cathode current collectors is configured as pairs, an anode layer formed and positioned around at least a portion of the anode current collector, a cathode layer formed and positioned around at least a portion of the cathode current collector, a separator layer formed and positioned around some portion of both the anode layer and the cathode layer, where the separator layer is configured to prevent electrical contact between the anode layer and the cathode layer, and an electrolyte establishing ionic conductivity between the anode layer and the cathode layer;    (2) an electrochemical battery cell (C3) comprising a cathode current collector configured as a wire having a predetermined cross-sectional profile, a cathode layer formed and positioned around at least a portion of the cathode current collector, a separator layer formed and positioned around at least some portion of the cathode layer, an anode layer formed and positioned around at least a portion of the separator layer that is configured to prevent electrical contact between the cathode layer and the anode layer, an anode current collector formed and positioned around at least a portion of the anode layer and an electrolyte establishing ionic conductivity between the cathode layer and the anode layer;    (3) a device incorporating an electrochemical battery cell comprising a powerable component having at least one set of positive and negative electrical contacts and a wire form electrochemical battery cell incorporated into or on the powerable component, where the wire form electrochemical battery cell has an anode current collector and a cathode current collector interconnected to the set of positive and negative electrical contacts, thus forming a complete circuit; and    (4) forming an electrochemical cell for use with a device, comprising drawing a length of wire form electrochemical battery cell from a supply of the wire form electrochemical battery cell, where the wire form electrochemical battery cell comprises an anode current collector and a cathode current collector, separating a predetermined length of the wire form electrochemical battery cell from the supply of the wire form electrochemical battery cell, providing a portion of both the anode current collector and the cathode current collector for making electrical contact with a device to be powered and configuring the wire form electrochemical battery cell into a predetermined shape for use with the device to be powered.    DESCRIPTION OF DRAWING(S) - The figure shows a partial cross-sectional, cut-away view of a biocompatible, single wire battery.    Biocompatible wire battery (10)