Thread: How often to change batteries in electric powered smoke detectors?
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Oren[_2_] Oren[_2_] is offline
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Default How often to change batteries in electric powered smoke detectors?
On Sat, 24 Sep 2011 14:19:13 -0400, "Robert Green"
wrote:

And. Why do they only go off at 3 AM.....

That's when it's coldest part of the day and dying alkaline batteries are
susceptible to the cold.

It don't get very cool here, inside.

There HAS to be another reason the thing alarms at 3 AM.

I have not found the answer.
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