"Ross Mac" wrote in message
...

"Andy Hill" wrote in message
...
"Mr Fixit eh" wrote:
Is it really necessary to change the batteries in the smoke detector
every six months? I would think once a year would be plenty, if even
that often.

Depends on how often you like to get up in the middle of the night to
track down
that annoying once-a-minute "low battery" beep.

Yeah, sure, once a year is usually fine. Heck, spend some dinero on the
fancy-dancy lithium batteries, and then don't mess with them at all until
the
10-year lifetime of the detector is up.


Why is it that they always chirp in the middle of the night...my
experience too....seems like too much of a coincidence....Ross

temps go down at night. battery thus has less charge. when it's on the edge,
that's enough to trigger the chirp.