Originally Posted by Juha
Are you sure about this? In my experience NiMH does a poor job at cold, but I always thought Li-Ion is better in this regard.
--J
I'm coming from a AA use here for cameras and other gadgets. I IMHO have experienced that NIMH's fresh off the charger into a digicam in ~ -30C - 35C w/ windchill (approx. -18C - 24C without windchill) in Canada's famous winters (I'm in T.O) don't last long. That's like around 0F for our friends south of the 49th parallel. I mean I managed to get about ~10-15 shots in about 30mins off my Canon S2-IS digicam before the batteries seized on me. When I took the batteries out they were pretty cold already. Those same batteries I used (I used 1100 mAh generics and 1850 mAh Energizers) back in Dec./05 in the summer yields me around 100~200 shots (flash, zoom, manula/auto tweaking settings, LCD on). When I changed to lithium batteries back in Dec./05, being pissed off all my batteries zapped out after 10-20 shots each dispite me keeping them around the bodies "hot" zones to keep them warm before use.
Now I've always heard Lithiums are king in the cold temps but never really put that tot he test myself being a NICAD/NIMH person for the ecomonical long run but I sprung the $6.00 for 4xAA lithiums then and managed around no less then 100 photos with flash and zoom. I think I got no more then 150 photos before the batteries drained out on me. Now that's a hell of a difference there getting ~10-20 shots with NIMH over Lithum. My second time with the lituims was when my GPS kept draining out on me around ~ -20C - -30C w/windchill (approx. -15C - -22C then without windchill) and I was using my NIMH batteries fresh off the chargers. I was using WAAS and full load (no power saving with full backlight on) and I got about just less then 2 hours of useage using the 1100mAh and 1850 mAh.
Both batteries felt bone cold when I took them out. My GPS model then was the Garmin Etrex Legend C which has a approx 32hr run time or about 9-10 hours with low backlight. When I dropped lithum batteires in I got around 5 hours on full load when the winds were howling outside. IMHO lithums seem to be king when you're out in the cold for sure. I had two situations I tried it in and it carried me through.
Zero_Enigma