I have a dead macbook that I'd like to fix. I can't find a model # on it? It is white, says macbook near the screen. It has a rubbery bottom. It says rated 16.5v 3.65a IC 4324a-brcm1047 and the year 2009. The battery is not user removable. I don't see anything that looks like a model #. Any ideas how to find the specific model #?