Are all watch batteries the same size? Let's clear it up

If you've ever popped open the back associated with a dead watch only to discover a little silver disk that looks slightly different from the 1 sitting in your junk drawer, you've probably asked yourself: are all watch batteries the same size ? The short, fairly frustrating answer will be a resounding no. It would be incredibly convenient in the event that we lived in a world where 1 universal battery fit every watch upon the market, yet the reality will be a confusing panorama of hundreds associated with different heights, diameters, and chemical compositions. ...

April 12, 2026 · 7 min · Ulrike Priecel