Guide to Identifying Your Laptop Model:
Click on the relevant logo in the top-left corner of your screen. Select 'About This Laptop' from the dropdown menu. A window will appear displaying your laptop's model information, including the model year and serial number. Alternatively, you can locate the model number on the bottom of your laptop's case or by checking the original packaging. By following these steps, you'll be able to accurately identify your laptop model, which can be helpful when determining compatibility with various accessories or software.

COMPATIBILITY:
For 15" A1286:
Mid 2009 models include MB985LL/A (2.66 Ghz Core 2 Duo), MB986LL/A (2.8 GHz Core 2 Duo), and MB986LL/A (3.06 GHz Core 2 Duo), as well as MC118LL/A (2.53 GHz Core 2 Duo).
Mid 2010 models include MC371LL/A (2.4 GHz Core i5), MC372LL/A (2.53 GHz Core i5), and MC373LL/A (2.66 GHz Core i7) and MC373LL/A (2.8 GHZ Core i7).
Early 2011 models include MC721LL/A (2.0 GHz Core i7), MC723LL/A (2.2 GHz Core i7), and MC723LL/A (2.3 GHz Core i7).
Late 2011 models include MD318LL/A (2.2 GHz Core i7), MD322LL/A (2.4 GHz Core i7), and MD322LL/A (2.5 GHz Core i7).

Identifying Numbers:
APN: 922-9034, 922-9314, 922-9751

At EYaoStar, we uphold a strict zero-tolerance policy against any form of return fraud, including product/parts swapping, inaccurate reason selection for returns, or returning empty boxes. Violators will be promptly reported to law enforcement and Amazon's Trust & Safety team.
We urge buyers to demonstrate integrity when requesting and selecting a return reason on Amazon. Any abuse or misuse of Amazon's return center may result in various consequences, including limitations on buying and selling privileges and account suspension. Returned items must be received back in their original, unaltered condition.
In the event of a return, please ensure that the tamper-proof sticker(s) remain intact on the product to verify its originality.
Please be aware that items returned showing signs of tampering or damage due to improper installation will not be accepted and are ineligible for a refund. Buyers found in violation will be reported to Amazon and restricted from making further purchases.