I have often heard that drawing pulses of more than about 15 mA from a
CR2032 coin cell will permanently degrade its capacity.

But TI has done the experiment and claims up to 30 mA with minimal
change in battery capacity:

http://focus.ti.com/general/docs/lit/getliterature.tsp?literatureNumber=3Ds=
wra349

Battery internal resistance is still the enemy, though.  A big
capacitor can help hold up the voltage during the current peak.

Looks like all testing was at room temperature too, which seems like a
big limitation.  Also interesting is the difference between claimed
and actual performance. (spoiler: Sony good, noname bad).

Regards,
Mark
markrages@gmail
--=20
Mark Rages, Engineer
Midwest Telecine LLC
markrages@midwesttelecine.com
--=20
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