I've switched all my cams to Lithiums because of there life and ability to not be phased by cold weather. I put a meter on 8 Energizer Lithiums that I bought 2yrs ago to use in my Scoutguard from Nov to March and they all still read 1.76v.
My Reconyx will only run on Lithiums and the book says I'll get 50,000 pics off one set.
Now I need to buy another camera's worth of C-to-AA adapters off Amazon to run Lithium AA's in my Cudde Captures.

btw I was referring to the link that pahuntergirl posted about the 3v batteries because that's what those were.