Battery For Apple Macbook 13" Aluminum Unibody [2008] Fits: A1278 A1280 O | eBay
Amazon.com: A1280 A1278 Battery Replacement New Laptop Battery for Apple MacBook Pro 13 inch (only for 2008 Version),Compabiel for MB771G/A MB467LL/A MB466LL/A - [Li-ion 10.8V/45Wh 6 Cell] : Electronics
MacBook Pro 15" Unibody Late 2008 and Early 2009 Battery Replacement - iFixit Repair Guide