Everytime I charge my girlfriend's nano leaving it plugged into my powerbook it seems that after a full charge message when I unplugged next time she tries to use it the battery icon is very low
so she hands it to me and says its not charged, I took over 3 hours for no charge so now I plug it back in went to sleep woke up and the battery is so low now that I can't even wake it up
What is this?