An apparatus configured to control transmission of wireless energy supplied to an electrically operable medical device adapted to be implanted in a mammal patient, is disclosed. The apparatus comprises an external energy source, an internal energy receiver located inside the patient and being adapted to receive the wireless energy, a stabilizing unit adapted to stabilize the wirelessly received energy in the electrically operable medical device, and a control unit comprising at least one of an internal control unit and an external control unit.
