DoN. Nichols wrote:
I'm
trying to remember the designator for the *big* single cells with a pair
of knurled nuts on the top for connection (or sometimes a Fhanestock
clip for each terminal). Those may have been 'G'. I know that as a kid
I made lots of things working from those.
Enjoy,
DoN.

"doorbell" batteries. :-)
...lew...