This is an OEM DC Jack will prevent damage to your laptop when you trip over the power cord. This part connects the AC wall adapter power to the logic board and is identified by 820-2565-A printed on the board.

Compatible Part Number: 820-2565-A,820-2565,820-2361-A,661-5217,661-5235,922-9288,922-9307

Compatibility:
- A1278:
Pro5,5 Mid 2009:MB990LL/A(2.26 GHz Core 2 Duo)
Pro5,5 Mid 2009:MB991LL/A(2.53 GHz Core 2 Duo)
Pro7,1 Mid 2010:MC374LL/A(2.4 GHz Core 2 Duo)
Pro7,1 Mid 2010:MC375LL/A(2.66 GHz Core 2 Duo)
Pro8,1 Early 2011:MC700LL/A(2.3 GHz Core i5)
Pro8,1 Early 2011:MC724LL/A(2.7 GHz Core i7)
Pro8,1 Late 2011:MD313LL/A(2.4 GHz Core i5)
Pro8,1 Late 2011:MD314LL/A(2.8 GHz Core i7)
Pro9,2 Mid 2012:MD101LL/A(2.5 GHz Core i5)
Pro9,2 Mid 2012:MD102LL/A(2.9 GHz Core i7)

- A1286:
Pro5,3 Mid 2009:MB985LL/A(2.66 Ghz Core 2 Duo)
Pro5,3 Mid 2009:MB986LL/A(2.8 GHz Core 2 Duo)
Pro5,3 Mid 2009:MB986LL/A(3.06 GHz Core 2 Duo)
Pro5,4 Mid 2009:MC118LL/A(2.53 GHz Core 2 Duo)
Pro6,2 Mid 2010:MC371LL/A(2.4 GHz Core i5)
Pro6,2 Mid 2010:MC372LL/A(2.53 GHz Core i5)
Pro6,2 Mid 2010:MC373LL/A(2.66 GHz Core i7)
Pro6,2 Mid 2010:MC373LL/A(2.8 GHZ Core i7)
Pro8,2 Early 2011:MC721LL/A(2.0 GHz i7)
Pro8,2 Early 2011:MC723LL/A(2.2 GHz i7)
Pro8,2 Early 2011:MC723LL/A(2.3 GHz i7)
Pro8,2 Late 2011:MD318LL/A(2.2 GHz i7)
Pro8,2 Late 2011:MD322LL/A(2.4 GHz i7)
Pro8,2 Late 2011:MD322LL/A(2.5 GHz i7)
Pro9,1 Mid 2012:MD103LL/A(2.3 GHz i7)
Pro9,1 Mid 2012:MD104LL/A(2.6 GHz i7)
Pro9,1 Mid 2012:MD104LL/A(2.7 GHz i7)

- A1297:
Pro5,2 Early 2009:MB604LL/A(2.66 GHz Core 2 Duo)
Pro5,2 Mid-2009:MC226LL/A(2.8 GHz Core 2 Duo)
Pro5,2 Mid-2009:MC024LL/A(2.8 GHz Core 2 Duo)
Pro6,1 Mid-2010:BTO/CTO(2.8 GHz Core i7)
Pro6,1 Early 2011:MC725LL/A(2.2 GHz Core i7)
Pro8,3 Late 2011:MD311LL/A(2.4 GHz Core i7)