NewerTech® : Batteries : NuPower® Battery for MacBook Pro 15" Unibody Mid-2009 and Mid-2010 Models
NewerTech® : Batteries : NuPower® Battery for MacBook Pro 17" Unibody Early 2009, Late 2009, & Mid 2010 Models
How to Upgrade/Replace the Battery in a 15-inch MacBook Pro (Mid 2010) MacBookPro6,2 - YouTube
How to Replace the Battery in a 13-inch MacBook Pro (Mid 2010) MacBookPro7,1 - YouTube
Amazon.com: GHU New Battery Replacement for A1331 Compatible with Apple MacBook Unibody 13 A1342 (Late 2009& Mid 2010) MC516LL/A MC207LL/A Battery Only fit 661-5391 10.8V 58 Wh : Electronics
Amazon.com: A1321 A1286 Battery for Apple Mac Book Pro 15 inch (Only for 2009 2010 Version) Fits MB985 MB986J/A MC118 MB986 Series Notebook -Ankon : Electronics
MacBook Pro 15" Unibody (Mid 2009/Mid 2010) Replacement Battery – A & M Digital Technologies, LLC