GreenBox Innovations New Laptop Battery for Apple A1281 A1286 (Late 2008, Early 2009 MacBook Pro 15 inch) Aluminum Unibody MB772LL/A MB470LL/A MB471LL/A &ndash; 12 Month Warranty [Li-Polymer 5000mAh / 54Wh] Battery type: Li-Polymer; Capacity: 5000mAh / 54Wh; Cells: 6-cell; Voltage: 10.8V. Quality: Grade A cells ensure fast charges and low power consumption. Protection: Built-in circuit protection, overcharge protection, over voltage protection ensures both safety and stability. Safety: Worry-free, products are passed CE-/FCC-/RoHS-Certified. Origin: 100% New from Manufacturer. Up to 500 recharge cycles over the life of the battery.