Brtong 15-Inch Li-ion 6-cell 5200mAh Laptop Battery for Apple A1281 A1286 Macbook Pro (2008 Version) Compatible Models: Macbook Pro 15" A1281 A1286 (2008 version) Compatible part number: MB772, MB772*/A, MB772J/A, MB772LL/A, MB772LLA, MB772JA, MB470*/A, MB470CH/A, MB470J/A, MB470LL/A, MB470X/A, MB471*/A, MB471CH/A, MB471J/A, MB471LL/A, MB471X/A, MC026ll/A Battery type: rechargable Li-Polymer Battery; Capacity: 5200mAh/56Wh; Cells: 6-cell; Rating: 10.8V Operation time for standard batteries: Around 2-3 hours, the actual operation time will depend on how much electricity is required by the device and how you use it Overcharger and Discharger Circuit Protection, CE-/FCC-/RoHS-Certified for safety, About 500 recharge cycles over the life of the battery. 24 x 7 email support, 18-month hassle-free warranty