Abstract: A system for determining an estimate of a battery capacity for the battery of an implantable device that is used over a period of time. The system includes an external device having a processor that is configured to communicate with the implantable device. During the initial phase, the processor is configured to determine the estimate of the battery capacity using battery energy consumption data and a battery capacity at the beginning of use. During the latter phase, the processor is configured to determine the estimate of the battery capacity based on the battery voltage. The system may include an intermediate stage and, during the intermediate phase, the processor is configured to determine the estimate of the battery capacity based on the battery energy consumption data and the battery voltage.

Abstract: An implantable pulse generator (IPG) includes a communication module configured to send data to and receive data. A data module is coupled to the communication module and configured to manage data relating to the identity and properties of the IPG. A pulse control module is configured to control the generation of one or more pulses by the IPG. The IPG also includes an energy storage device configured to store energy and a first housing, the first housing containing at least a portion of the IPG. Further, the IPG includes an antenna coupled to the communication module. The antenna is selectively electrically coupled to the first housing.