LB1 High Performance Battery for Apple 020-7149-A [Early and Late 2011] Macbook Pro 17 inch Unibody MD311LL/A Battery Type: Li-Polymer; Capacity: 8800mAh/95Wh; Cells: 9-cell; Voltage: 10.95V 100% Brand New from Manufacturer. Rechargeable Up to 500 times over life of battery. Premium Grade A cells ensures peak performance and reliability. Operation time depends on the power consumption of equipment, configuration and how you use it. CE-/RoHS-/FCC- Certified and Built-in circuit protection ensure both safety and stability. Live Support Mon-Fri 4am-8pm PST | Sat-Sun 8am-5pm PST | 18 Months Hassle-Free Warranty.