I want to make a battery tester. I am in the UK.
I'll use a fixed metal sheet which I will press the positive stud of a cell on. (A meter probe will go to the other end.)
(1) I tried an aluminium sheet for the metal but it didn't make good contact possibly on account of repeated re-tarnishing.
(2) I'm considering a metal strip like the contacts on a 1289 (3LR12) battery:
(3) What alternative material could I use? Perhaps a plated metal sheet of some sort?