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YES it is possible! Our hallway smoke detector started chirping in the middle of the night back in December. After replacing the batteries and having it still go off, we pulled it out of the ceiling. Well, that didn't slow it down either! What we discovered was that smoke detectors have roughly a 10 year life expectancy...and once they start to fail they'll go off randomly. After weeks of intermittent alarms, Mr. Swanie finally replaced all 6 detectors in our house and it solved the problem!
Can you post the make and model of your detectors? There was one manufacturer that seemed to have more problems than the others.
swanie
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