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Our daughter is home from grad school. (This is not the rant -- it's the first time she's been home since the pandemic lock downs started!) The house just feels more right when we're all home and the kids are in their own beds.
So, she was in her bed, asleep, by midnight. I was the only one still awake and up -- I'm a night owl.
And, at ten minutes before 4AM one of the smoke detectors started chirping its once-a-minute dead battery warning. To make matters even "better" it was the smoke detector in her room!
How do smoke detectors know what time it is? In all my years I've never had a smoke detector battery die while the sun was up. I'm pretty sure they only die between midnight and 6AM. How do they know?
(All of our smoke detectors are on the same circuit. Sometimes, when I replace the battery in one I trigger all the rest. Tonight I got away with it. I'll replace the rest of the batteries during the daylight -- assuming none of the rest die while I'm sleeping!)
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