In article ,
dennis@home wrote:
Thing is the bell box should be situated where it's difficult to get
at. Which means changing it or the battery equally difficult?

The battery is fine for years.
Not all buildings have somewhere difficult to get to.

Handy for a can of foam, then?

--
*I'll try being nicer if you'll try being smarter

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