A charging device (40, 100) for charging an implanted medical device (2, 150), comprising: a replenishable power supply (42, 102); a coil assembly (44, 101, 160) electrically coupled to the power supply (42, 102), the coil assembly (44, 101, 160) including a primary coil and a plurality of sense coils (106, 108) positioned proximate to the primary coil; electrical circuitry adapted to: measure an electrical parameter of the coil assembly (44, 101, 160); and determine a position of the coil assembly (44, 101, 160) relative to a position of the implanted medical device (2, 150) based on the measured electrical parameter, wherein the measured electrical parameter includes an electrical voltage of at least one of the sense coils (106, 108), and wherein the electrical voltage is induced in response to a magnetic flux generated by the primary coil; and a visual communications interface; characterized in that the visual communications interface comprises a flat panel display screen and is adapted to: receive an input from the electrical circuitry; and visually display on the flat panel display screen the position of a graphical representation of the coil assembly (44, 101, 160) relative to the position of an image of the implanted medical device (2, 150) based on the input received from the electrical circuitry. a replenishable power supply (42, 102); a coil assembly (44, 101, 160) electrically coupled to the power supply (42, 102), the coil assembly (44, 101, 160) including a primary coil and a plurality of sense coils (106, 108) positioned proximate to the primary coil; electrical circuitry adapted to: measure an electrical parameter of the coil assembly (44, 101, 160); and determine a position of the coil assembly (44, 101, 160) relative to a position of the implanted medical device (2, 150) based on the measured electrical parameter, wherein the measured electrical parameter includes an electrical voltage of at least one of the sense coils (106, 108), and wherein the electrical voltage is induced in response to a magnetic flux generated by the primary coil; and measure an electrical parameter of the coil assembly (44, 101, 160); and determine a position of the coil assembly (44, 101, 160) relative to a position of the implanted medical device (2, 150) based on the measured electrical parameter, wherein the measured electrical parameter includes an electrical voltage of at least one of the sense coils (106, 108), and wherein the electrical voltage is induced in response to a magnetic flux generated by the primary coil; and a visual communications interface; characterized in that the visual communications interface comprises a flat panel display screen and is adapted to: receive an input from the electrical circuitry; and visually display on the flat panel display screen the position of a graphical representation of the coil assembly (44, 101, 160) relative to the position of an image of the implanted medical device (2, 150) based on the input received from the electrical circuitry. receive an input from the electrical circuitry; and visually display on the flat panel display screen the position of a graphical representation of the coil assembly (44, 101, 160) relative to the position of an image of the implanted medical device (2, 150) based on the input received from the electrical circuitry.