I need to replace the battery in my macbook pro A1286 serial number W0930A5YD77YA . I need advice about where to buy it, I see a lot on ebay with great warranties but I am very hesitant to throw a battery from China into my mbp, you all think that there might be any problems, should I worry? If so where would you recommend buying the battery from. also a lot of the batteries that I could find have a 5200mah capacity not the 6500 that the original battery has. THanks for the input