Compatible Part Number:
A1382 020-7134-A, 661-5211, 661-5476, 661-5844 

Compatible Models:
Apple Macbook Pro 15.4 inch Mid 2012 Version: 
MacBook Pro 15.4" 2.3GHz Core i7 (A1286) - Mid 2012 (MD103LL/A) 
MacBook Pro 15.4" 2.6GHz Core i7 (A1286) - Mid 2012 (MD104LL/A)
  MacBook Pro 15.4" 2.7GHz Core i7 (A1286) - Mid 2012 (BTO/CTO) 
Identifiers: MacBookPro9,1 

Apple Macbook Pro 15.4 inch Late 2011 Version: 
MacBook Pro 15.4" 2.2GHz Core i7 (A1286) - Late 2011 (MD318LL/A)  MacBook Pro 15.4" 2.4GHz Core i7 (A1286) - Late 2011 (MD322LL/A)  MacBook Pro 15.4" 2.5GHz Core i7 (A1286) - Late 2011 (BTO/CTO)  Identifiers: MacBookPro8,2 

Apple Macbook Pro 15.4 inch Late 2011 Version: 
MacBook Pro 15.4" 2.0GHz Core i7 (A1286) - Early 2011 (MC721LL/A) 
MacBook Pro 15.4" 2.2GHz Core i7 (A1286) - Early 2011 (MC723LL/A) 
MacBook Pro 15.4" 2.3GHz Core i7 (A1286) - Early 2011 (MD035LL/A) 
Identifiers: MacBookPro8,2 

• Battery Type: Li-Polymer; Capacity:77.5Wh; Cells: 9-cell; Voltage: 10.95V
• Replace for Apple MacBook Pro 15.4" A1286 (Core i7 Early 2011 Late 2011 Mid 2012 Only) MD103*/A MD104*/A MD318*/A MD322*/A MC721*/A MC723*/A
• 100% New from Manufacturer. Up to 500 recharge cycles over the life of the battery
• Operation time for standard batteries: Around 2-3 hours, the actual operation time will depend on how much electricity is required by the device and how you use it.
• CE-/FCC-/RoHS-Certified for safety. 24 x 7 email support, 8-hr x 5-weekday call support, 18-month hassle-free warranty

Battery Type: Li-Polymer; Capacity:77.5Wh; Cells: 9-cell; Voltage: 10.95VSKstyle