I am just kind of worried that it doesn't even fit. Do I need to kind of pop the expanded portion of the battery to get it to fit back in? The case of the battery has come apart and so to fit it back in I would have to press it back together. The battery is low count and had great capacity when it happened. I don't want to have to buy another one when this one is fairly new.
I've read reports on the web about this problem happening with the 17" models. The battery swells up and, while it probably won't explode on you while you're using your computer, it can cause deformity to your computers body. Get it replaced professionally as soon as you can. If you're covered under warranty, that's even better.