Mark was interested in powering a microcontroller circuit under fairly extreme conditions for a long time, so lithiums seemed to be a reasonable readily-available choice for that application. For more mundane uses, quite likely alkalines would be a more cost-effective choice. :)
Bob
Possibly, but without knowing the actual current drain, time between service, possible power availabilty from other sources, size and weight constraints etc. etc. it's impossible to say whether it's a *good* option.
Without a doubt.
MrT.
I may need to opt for a Lithiums at 1.6V for most of their life or opt for a third cell just to have some voltage margin to play with as I really need a few different voltages for the project.
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