NewerTech® : Batteries : NuPower® Battery for MacBook Pro 17" Unibody Early 2009, Late 2009, & Mid 2010 Models
MacBook Pro 15" Unibody (Late 2008-Early 2009) Battery
The Best Battery Life I've Ever Seen - Apple's 2009 MacBook Pro: Battery Life to Die For
Amazon.com: iProPower A1322 Battery Replacement for 13 inch MacBook Pro A1278 2009 2010 2011 2012 Year : Electronics
Genuine OEM Original Apple MacBook Pro 15" A1281 Battery for sale online | eBay
A1321 Laptop battery For Apple Macbook Pro 15" A1286 2009 2010 year Version 020-6380-A - AliExpress
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Amazon.com: Ftenlyen A1322 A1278 Battery Replacement - A1322 Battery for MacBook Pro 13 inch Mid 2012 2010 2009 Early 2011 Late 2011 Version High-Performance and Long Lasting [ 10.95V 63.5WH ] : Electronics
MacBook Pro 15" Unibody (Late 2008-Early 2009) Battery