The present invention relates to an implantable medical device system, comprising an implantable medical device (100) configured for maintaining an actual status of a power source (180) contained in the implantable medical device (100). The implantable medical device system further comprises an external programmer (202) including a status indicator (248) configured for indicating an estimated status of the power source (180). The external programmer (202) is configured for being placed in telecommunicative contact with the implantable medical device (100) to reconcile the estimated status of the power source (180) with the actual status of the power source (180).
