On 5 June, 17:34, "Dave Plowman (News)" wrote:

I've never seen a lead acid fitted to a bell box - they are usually
Ni-Cads or later types. What makes used them?

No idea - generic tin boxes from the cheap shop when I fitted them,
also some insanely expensive stuff that a friend fitted to his factory
building and a fish-named locksmith came and billed them a shedload of
money for annual servicing, with new batts every few years. Newer than
NiCds, older than capacitors.