What signal does a carbon monoxide detector give when the battery is at the end of its life?

The signal given by a carbon monoxide detector when the battery is at the end of its life is a chirp every 30 seconds. This audible alert serves the essential purpose of notifying the user that the battery needs to be replaced to ensure the detector remains operational. It's crucial to recognize the importance of maintaining a functional detector, as it plays a vital role in safety by alerting occupants to the presence of carbon monoxide, which is a colorless, odorless gas that can be harmful or even fatal.

Understanding the various chirping patterns of detectors, including those for end-of-life batteries, helps individuals take timely action on maintenance, ensuring that their safety equipment is always ready to function effectively. Other options provide different chirping intervals, which do not align with the standard alerts for battery replacement, making them less relevant in the context of carbon monoxide detector maintenance.