Plz state model of camera, estimated (or actual) lowest/highest temperature & venues of which it was field tested as well.
For example in my case...
Model: Minolta Dynax 5D
Battery: Proprietary Li-ion
Lowest Field Operating Temperature: -10 degrees celsius
Venue: Japan (Wakkanai, Cape Soya)
Highest Field Operating Temperature: Apprx 29 degrees celsius
Hopefully mods will make it a sticky so that newbies whom are concerned abt battery life of their cameras in extreme temperatures can have a rough gauge.