#$%^&*AU2016200951A120160303.pdf#####Abstract An external processor device, for a hearing implant system that stimulates audio nerve tissue in a cochlea based on an implant data signal, the device comprising: an external processor housing having a generally planar skin contacting surface and a central axis perpendicular to the skin contacting surface a signal processor within the processor housing for developing the implant data signal a transmitter coil within the processor housing for coupling the implant data signal across the skin to the hearing implant system and a battery container forming an annular compartment around the central axis and containing a battery arrangement to provide electrical power to the signal processor and the transmitter coil wherein the battery arrangement includes a plurality of battery cells, each battery cell occupying a respective annular section within the battery container, the respective annular sections being arranged in the battery arrangement so as to minimize an eddy current produced in a coil, of the hearing implant system, that is inductively coupled to the transmitter coil. 7375774 1 (GHMattersl P86259.AU.2 15/02/20162/9 200 201 213 21120 210 F209 212 t 214 2142027 202 203 204 IMPLANTED PROCESSOR 206 205 FIG. 2