my 30g ipod vid dies on the slopes all the time too. and i do believe it is due to the cold. i tested it one time, fully charged, stuck it in my car and left it over night. and in the morning it said no battery power remains. i warmed it up inside and the battery was back to full. and just today, i went to listen to it at work, all my music is gone. dont kno what the eff happened.?
Take yourself to higher places.