The invention is a system and method for detecting the status of a rechargeable battery included within an implantable medical device. The medical device can incorporate a status indicator which signals the user concerning the battery status, e.g., low battery level. The signal may be audible or it may...http://www.google.de/patents/US20030114899?utm_source=gb-gplus-sharePatent US20030114899 - Patient programmer for implantable devices
