I'm just back from a 3 day outing for my Holidays. I took my D200 along while cross-country skying wondering how it would cope with the cold temperatures. My main concern was about the battery behaviour. These were not extreme conditions. The coldest day, the first one, was at -12 C (15 F) or so. The D200 fared perfectly, which was no surprise (I had the D70 out last winter at -30C). I was shooting compressed NEF, mainly using the 18-70, no flash, and some quick chimping. I was carrying a spare battery in my shirt pocket, not knowing what to expect from the one in the camera. Well, after two days, it has given me a little over 200 shots. This battery was in its second cycle only. Here are three shots from the fist day.