RECHARGE Sub-Study to the Implantable Systems Performance Registry (ISPR)

Inclusion Criteria: * Patient is enrolled in the Implantable Systems Performance Registry (ISPR) and will receive one Activa RC as their first implantable neurostimulator or as a replacement implantable neurostimulator for DBS. * Patient must meet the indications in the Activa RC labeling. * Patient (or patient's legally authorized representative) signs and dates the appropriate RECHARGE Informed Consent Form and/or Informed Assent Form and Authorization to Use and Disclose Health Information (HIPAA, US only). * Patient has a diagnosis of Parkinson's Disease, Essential Tremor, or dystonia that meets the approved indication for Activa RC in the applicable geography. * Patient with dystonia is 7 years of age or older (EU only). * Patient with either PD or ET is 18 years of age or older. * Patient (or caregiver) is able to use the patient programmer and correctly interpret the icons. * Patient (or caregiver) is able and willing to regularly monitor the status of the rechargeable battery and respond appropriately. * Patient (or caregiver) is able to locate the INS, position the recharge antenna for sufficient coupling, put on the recharge holster/belt, and monitor progress during the recharge session. * Patient (or caregiver) is able to perform recharging activities for sufficient duration and frequency to maintain therapy and to perform recharging activities on an ongoing basis. * Patient is willing and able to comply with protocol requirements. Exclusion Criteria: * Patient has a contraindication identified in the Activa RC labeling. * Patient who is currently enrolled in or plans to enroll in any concurrent drug and/or device study that may confound the results of the RECHARGE study. * Patient has or will be implanted with a non-Medtronic Deep Brain Stimulation system component.