In message , Paul
writes
Snip

Some cells are knackered in the package. I was sold a
CR2032 at the mall, which was dead about a day after I
got it, which meant the product had been sitting in
that store for 10+ years. Or, it was a counterfeit
of a very inferior nature. No amount of fingerprints
would be responsible for that. Another cell purchased
elsewhere, behaved properly. It's not like I had
premature failures one after another, just the one
cell that was knackered, out of the package.

Some battery powered devices have a constant battery drain despite being
*switched off*.

My two are a pistol grip laser thermometer and a digital vernier gauge.
Left connected, 4 weeks battery life:-(

--
Tim Lamb