CSE New Laptop Battery [Li-Polymer 6 cell 5200mAh 56Wh] for Apple A1281 A1286 Macbook Pro 15" Aluminum Unibody (2008 Version) - 12 Months Warranty CSEXCEL A1281 Laptop Battery for 2008 Apple MacBook Pro 15 A1286 Battery Part No.: A1281 Battery Battery Capacity: 5200mAh (56Wh) Battery Voltage: 10.8V Battery Cell: Li-Polymer CE-/FCC-/RoHS-Certified for safety,12 month warranty. Please confirm that your laptop's model number, the original A1281 battery's part number and your laptop's version correctly match this replacement battery. You can access this information on your computer by: About this Mac --&gt;More info... --&gt;Serial number--&gt;Check your laptop's version on Apple's offical website or Google the serial number.