Spinal cord stimulator system

A wireless charger for inductively charging a rechargeable battery of an implantable pulse generator (IPG) that generates spinal cord stimulation signals for a human body, the wireless charger comprising:

• a charging coil adapted to be wirelessly coupled to a receiving coil of the implantable pulse generator to charge the rechargeable battery;
• a reflected impedance sensor coupled to the charging coil to detect a reflected impedance of the charging coil;
• a vibrator;
• an alignment circuit coupled to the reflected impedance sensor and the vibrator, the alignment circuit adapted to control the vibrator to output a tactile signal indicative of the alignment of the charging coil to the receiving coil based on the detected reflected impedance.