Batterytec&reg; Laptop Battery for Apple A1382 A1286 (For Core i7 Early 2011 Late 2011 Mid 2012) Unibody Macbook Pro 15", MC721 MC723 661-5844 MC721LL/A. [10.95V 5200mAh, 1 Year Warranty] Battery Type:Li-Polymer, Cells:6-cell, Capacity: 5200mAh; Voltage: 10.95V. 100% New Manufacturer. To 500 charging cycles during the lifetime of the battery. CE-/FCC-/RoHS-Certified for safety. 24 x 7 email support, 12 months Warranty without problems. Class A cells provide fast loads and low power consumption, chip protection offers both security and stability.