ya cold has great effect on battery life with ipods,cameras,videocameras, and phones. i ski in the midwest and conditions are usually pretty cold, but ive never had problems with running out of battery with my ipod. one time i was about to take some pictures with my dads d200 and it was out in the car for awhile, and before we left i had fully charged the battery and when i turned the camera on, after i pulled it out of the car, is was totally dead.