Walking into the other bedroom I did notice this one had a bright little light that flashed along with the chirp, so it was easy to identify which one was the offender.
What boggles my mind is why they can't put a simple timer in these things that delays the start of chirping until 7am or so once low battery is detected. Of course that might render the flashing light less useful, but that's a tradeoff I'm willing to take.
Maybe this is a business opportunity we can monetize? Design a smoke alarm, or mods to First Alert units, to guarantee no chirping before a given time of day. I'd pay for that.
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