On 12/12/2016 17:38, Clive Arthur wrote:
On 12/12/2016 17:21, Chris Green wrote:
I'm after a doorbell (preferably one which has two or more sounders)
which doesn't use batteries at all. I.e. both the button(s) and the
sounders are mains powered. I don't even mind all that much if wire
is required between the button(s) and the sounders but wireless would
be easier.

Are there any out there? I can find quite a few with mains powered
sounders but they still have battery powered buttons.

Why the fear of battery powered components?
They work well enough and run for almost as long as the shelf life.

I don't know, but it's worth pointing out that the bell push batteries
last pretty much the battery shelf life in normal use as they're only
drained when the button is pushed.

Moreover the modern piezo sounders are highly efficient and loud unlike
the old prehistoric 2A solenoid soft iron ding-dong things from way
back. The other advantage is that you can go wireless and/or have a
choice of tunes for different bell pushes.

Unless you need a continuously lit bell push then mains bell setups are
no longer really worth it (and even then current drain can be kept low
enough that a set of D batteries will last ~5000hr = 200 days).

--
Regards,
Martin Brown