So I was listening to my iPod earlier, and it ran out of power. So, I plugged it into its charger, opened up iTunes, and went out for a while.

I got back a while ago and checked on it. There wasn't a charge. I checked all the plugs for my USB port, and everything was inserted properly.

Why is my iPod not charging? I'm sure its nothing to do with the computer or USB port, since I charged it on Wednesday night and it was perfectly fine, and no one has been even near the computer since then. The thing is, I have no clue what the problem could be.

How can I fix this? If it matters, I have an iPod NaNo, the old style, and its about 2 and a half years old.