Replying to GoPro HD helmet hero battery question

hey guys,

im considering buying a gopro pretty soon for the upcoming season, i was just wondering if anyone has used the one with the new lithium battery.

how does it hold up in the cold? i know my other gear like my iphone and mp3 player and even my other camcorder will sometimes crap out really fast if it gets super cold out, then they'll only wake back up again if i warm them up.

does the gopro have the same problem, or does it hold up well against the cold air when it's stuck to the top of your helmet?