Very nice shooting there, Hoff! 
I went out on my first real winter expedition with my 1DsMk II today as I really wanted to see how the camera performed under an extended exposure to sub zero temps and started off with one battery that I had been using on the same charge for close to a week and the second, fully refreshed and charged in my breast pocket of my coat...just in case! I was amazed to see that the first battery held out for the entire trek through the woods and only after an hour, did it start to fade, going to the low indicator mark on the gauge. Though now back at home, it seems to have revived itself!
Anyway, a couple of shots from my adventure!
Cheers!




! Would love to see the 1ds2 before my 5dmk2 arrive!




