Just as a bit of feedback, for safety equipment like smoke and CO detectors, standard guidance is to replace the battery at least once a year. (Unless you have

Just as a bit of feedback, for safety equipment like smoke and CO detectors, standard guidance is to replace the battery at least once a year. (Unless you have an integrated 10 year battery that will last the life of the detector) If you live in an area that follows Daylight Savings time, doing it then is best so that you remember. Otherwise doing it during the Operation Edith drill for Fire Prevention Week is the next best.