In article ,
PeterC wrote:
You won't get a loud sounder *and* decent battery life from a 9 volt
battery.

We had one of those old Friedland things with the 4.5V battery and it
was plenty loud enough. Due to old age (the bell) and difficulty in
getting batteries, we no use a wireless thing. If I could get another
4.5V one I'd use 4 Eneloops in it - almost zero running cost and should
last a couple of years on a charge.

You can still get battery operated wired door bells - TLC sell them.
Usually use D cells these days.

By 9 volt I assume referred to a PP3. A small battery totally unsuited to
this use - unless driving one of those weedy electronic warblers.

--
*A closed mouth gathers no feet.

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