so i've had to exchange my ipod nano, and i got a new one today. regarding battery charge, when I got my nano i synced up my music, occasionally unplugging it to check the album artwork had been added to songs properly, but i didn't leave it to charge fully, until i plugged it into a main adapter - non apple - does that matter? it's still on charge now, but the battery icon still is showing the 'lightning bolt' on the battery icon after about 2hrs charge. when will it be charged, after how long? secondly, i've used about 12 or 13gb's of storage on my nano, but only have about 1700 songs on it. how come? i thought 16gb was like.. 3000 songs? .. and what's the best way to back up a music collection? i have an external hdd, but heard they can wear out... though i never use it apart from when using it to back up stuff.