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Old January 8th, 2010, 06:40 PM
VanceCope VanceCope is offline
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Join Date: Jun 2006
Posts: 1,460

Originally Posted by DFW333 View Post
When the battery starts to fail in an ionization detector, the ion current falls and the alarm sounds, warning that it is time to change the battery before the detector becomes ineffective.
of course mine always seem to fail in the middle of the night, and there is nothing more annoying than that beep a detector makes, and of course it's always the one you have o have the ladder/step stool for
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