Hello everyone, I want to replace my june 2009 15" MacBook Pro's battery and I've done some research but can't seem to find what kind of battery I need to buy. I have two numbers MB985 and A1286. A1286 is the model number and I'm guessing that MB985 says that it is a june 2009 15" Macbook Pro. Now i'm wondering what numbers need to match? I see alot of battery's for MB985 but then it says the part number needs to be A1321. Will this fit, or do I need to look for an equel part number, or do both need to match? Thanks in advance, Bart.