Charging and updating of an implantable hearing aid

An implantable hearing aid system, comprising:

• a charger unit including a coil unit having a first resonance frequency,
• a hearing aid, including:
• a rechargeable battery,
• an inductive coil arrangement having a second resonance frequency configured to form an inductive charging link with the coil unit to receive power signals from the charger unit,
• a voltage decreasing converter configured to decrease a voltage of the power signals received from the charger unit for use in charging the rechargeable battery, and
• a voltage increasing converter configured to increase a voltage of signals obtained from the rechargeable battery, and
• an implantable component including an implantable coil, wherein the inductive coil arrangement is further configured to form a transcutaneous link with the implantable coil to transmit at least one of data and power to the implantable component, and wherein the first resonance frequency and the second resonance frequency are substantially the same and within a frequency range of between 80 kHz to 300 kHz,
• wherein the hearing aid further comprises a capacitive circuit arrangement configured to adjust the resonance frequency of the inductive coil arrangement to a plurality of resonance frequencies including at least the second resonance frequency via a respective tuning circuit, and
• wherein the signals obtained from the rechargeable battery, whose voltage is increased by the voltage increasing converter, are used for transmission of the at least one of data and power to the implantable component via the inductive coil arrangement and the transcutaneous link.