Well here is something interesting to add to this, I got to looking at the battery and it appears the outer casing, right next to the button is coming off, you see it when you remove the battery and you can see it when you install the battery and look at the bottom of the notebook. Maybe it got too hot? It's a Macbook pro 17" it's about 9 months old, not sure if apple would warranty it or not, worth a call i guess.