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Why do smoke detector batteries go dead at 4am?	by YakkoWarner	2002-07-23 09:55:41
Hate to state the obvious ...	by mufasa	2002-07-23 14:19:10
but 4 am is probably about the time of the coldest indoor temperature during the night. Like most chemical reactions, batteries perform worse in lower temperatures, so a half-dead battery will drop to a rather lower voltage during the coolest part of the night - hence triggering the under-voltage alert on the smoke detector.
[ Reply ]
Go ahead and state the obvious already.	by Naruki	2002-07-23 14:41:17
But no smoke or else ....	by Medentic	2002-07-23 14:59:38

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