Handbags   (The sad, the bad and the ugly. Non-productive stuff here.)

But not as easy as changing just the one which requires changing!

THERE IS ABSOLUTELY NO PROBLEM TESTING THE BATTERIES.

It takes me all of three seconds to do it.

I have only described the process to illustrate how I had come to encounter the phenomenon of polarity inversion.

It is something I have never previously encountered! Or, even heard of prior online search in response to what I found.


(changing the A23 Battery in bell push a bit more involved: I am sure that I could find one locally, but it is not worth the trailing around the shops to find one. Easiest just to order online. As I will get around seven years out of it, it is not one that I will have in stock.)

Anyway, as my post has drawn no response from any of the techie folk on these boards, I guess no one has owt to say on the topic of polarity inversion.