I hadn't even touched the battery since I got my computer. The battery is the one it came with, of course it's a Sony, you dolt. I hadn't taken it out, wiggled it or anything. I was just minding my own business when that popped up, and it forced me to click "ok" which put the computer into hibernate. I took out the battery, put it back in, and it was fine. Gr.
Uh, yeah, if my computer really had 30 hours with only 8% left, I'd love it forever. But no, that's not the case. This was actually a while ago, but when it was fully charged, it said something like 10%. The battery life in reality was normal (about 2-3 hrs) but it was frustrating because I didnt know how much I really had left.