Is there some kind of widespread CR2032 issue?

[David Hess]

There are a lot of dodgy lithium coin cell "manufacturers" out there.

[rollatorwieltje]

Funny, I have the same issue with the CR2032 in my bicycle computer. The original one that came with it lasted for 2 years, the current one went "bad" within a year. It still works, but pressing a button or detection of the wheel magnet causes the LCD segments to dim So obviously it can't really deliver any amount of current anymore.

[saturation]

http://www.embedded.com/electronics-blogs/break-points/4429960/How-much-energy-can-you-really-get-from-a-coin-cell-

[rr100]

THAT sounds really interesting!
Especially the capacitor hint versus internal resistance, this would be a critical point for things that deep sleep most of the time (like remote key fobs). In fact I need to check my devices as well, maybe the capacitors go bad (or at least worse) after a while (years).

[saturation]

Its quite the coincidence he did such a detailed check of Wh that's just the core of this discussion; and that so much depends on actual power draw and actual maker of the cell as demonstrated.