hello! my iPod classic is 2,5 years old and this winter I noticed that it reacts on the cold too sensibly. I mean when it's cold the battery gets uncharged too quickly. also if I use shuffle for all the songs I have and skip about ten or twenty songs the battery becomes uncharged too. although some time later (about 3 hours) I can restart it and everything would be OK. is it a battery issue? maybe it's time to change it? now when it's summer it works OK if I don't switch the songs too often. can play all day long. I guess there's something to do with the temperature and the song switching? what do you think?