NewerTech NuPower Battery for Mid 2009 & Mid 2010 NWTBAP15MBU85N
BTI 6-cell Battery for Apple MacBook Pro 15.4" A1321 (A1321-BTI)
Other Hardware Changes - Apple's 2009 MacBook Pro: Battery Life to Die For
Buy A1321 A1286 Battery (2009, 2010) -TECHOWL Replacement Battery for MacBook Pro 15 inch(Mid 2009 Mid 2010 Version) Fit for MacBookPro8,2 9,1 A1286 Battery [10.95V/77.5Wh] Online in USA. B08P5LS9N7
Battery For Apple MacBook Pro 15 A1286 661-5211 Mid 2009 Early/Late 2010 A1321 C | eBay
MacBook Pro 15" Unibody (Mid 2009-Mid 2010) Battery - iFixit