In article ,
Martin Brown wrote:
Crikey. A decent SLA in such a friendly environment should last a lot
longer than that. Got 11 years out of one car battery.

It isn't all that benign an environment especially for the external bell
battery in the external sounder. Being on float charge ready to go kills
them in 3-5 years. Worth testing before swapping out though.

I was assuming it was a faulty one in the panel which would cause the
alarm to go off if mains lost?

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*If you don't like the news, go out and make some.

Dave Plowman London SW
To e-mail, change noise into sound.