Nikon D60 battery not charging?

I bought my D60 about a year ago, and recently the battery won't charge anymore. I charge it for a few hours (as I always have) but when I put it in the camera it still has no bars in the battery. It then turns off.

Does anyone else have this problem? And what can be done? Would I need to buy a new battery?

Lithium Ion batteries do 2 funny things, they begin to die as soon as they are born and they will never charge again if you let them completely use up their energy, even just once. So either way you need to buy another battery.