An implantable medical device includes a rechargeable battery and a battery recharging assembly. The battery recharging assembly includes an energy receiver for capturing energy from an externally applied charging field, a battery charging circuit that is operably coupled to the rechargeable battery for recharging the rechargeable battery, and a demodulator that is operably coupled to the energy receiver and the battery charging circuit. The demodulator demodulates the energy captured by the energy receiver and delivers demodulated energy to the battery charging circuit to be used to charge the rechargeable battery. The IMD includes a controller that is configured to control operation of at least part of the IMD.
