"Martin Brown" wrote in message
news
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?

Its not fear, its preference.

They work well enough and run for almost as long as the shelf life.

But mains powered bells work for a lot longer than that.

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.

Just as true of mains powered ones.

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).

Mains powered ones last a hell of a lot longer than that without any owner
action.