Elective replacement indication generation

A system, comprising:

• a power source configured to be implantable within a patient;
• measurement logic configured to obtain samples of a signal indicative of a characteristic of the power source;
• and
• a control circuit configured to determine when a first sample of the signal having a first predetermined relationship to a first threshold is received, and to initiate issuance of an elective replacement indication if a predetermined amount of time elapses following receipt of the first sample and before receipt of a second sample of the signal having a second predetermined relationship to a second threshold.

An implantable medical device, comprising:

• a power source;
• measurement logic configured to obtain samples of a signal indicative of a characteristic of the power source;
• and
• a control circuit configured to determine when a first sample of the signal having a first predetermined relationship to a first threshold is received, and to initiate issuance of an elective replacement indication if at least a predetermined period of time elapses following receipt of the first sample and before receipt of a second sample of the signal having a second predetermined relationship to a second threshold.

A non-transitory storage medium storing instructions to cause a control circuit to:

• receive samples of a signal indicative of a characteristic of the power source;
• determine when a first sample of the received samples has a first predetermined relationship to a first threshold;
• and
• issue an elective replacement indication if a predetermined period of time elapses after receipt of the first sample and before receipt of a second sample of the signal having a second predetermined relationship to a second threshold.