On Tue, 26 Nov 2013 17:29:25 +0000, Tim Watts wrote:

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

shrug
Just buy rechargables.

Which are almost completely useless for this type of application, with a
nominal cell voltage of 1.2V and lower when it's cold.

And have a nasty habit of retaining a decent voltage that disappears
rapidly when you put a load on, like the trying to sound the alarm...

--
Cheers
Dave.