On Tue, 26 Nov 2013 17:15:31 -0000, "ARW"
wrote:

"Mark" wrote in message
.. .
On Sat, 23 Nov 2013 22:22:29 +0000, Tim Watts
wrote:

On Saturday 23 November 2013 14:28 ARW wrote in uk.d-i-y:


The chirping often happens in the middle of the night as that is when
the
temperature of the house drops, that temperatrure drop also drops the
voltage on the battery and the alarm starts to chirp (it detects the low
voltage on the battery).

Makes sense and a most useful snippet - ta!

And not hugely obvious - I've seen batteries drop voltage badly outdoors
in
winter, but would not have assumped that a cool night indoors could make
enough difference.

Note to self - remember to change the batteries more often.

5 or 6 quid will buy you a 10 year lithium battery.

That would last longer than the alarm itself. However the
instructions say to use only high quality alkali batteries, but that
may be rubbish. IIRC it says only Duracell and one other brand.
--
(\__/) M.
(='.'=) If a man stands in a forest and no woman is around
(")_(") is he still wrong?