The CR2032 tester in action

I dug up this image of the CR2032 tester with a coin cell inserted.

coin cell tester in action

The coin cell doesn’t have to be inserted completely for the tester to work, which reduces test time (no need to mess up/bend fingernails prying the battery out too). The next best thing to add to this design would probably be a plastic non-conductive ejection system. But i’m not in the business of testing lots of coin cell batteries (yet).