Dtk Laptop Battery For Apple A1382 A1286 (only for Core i7 Early 2011 Late 2011 Mid 2012) Unibody Macbook Pro 15" . fit 661-5476 661-5211 Free Screwdrivers [Li-Polymer 6-cell 10.95V 6800MAh 78Wh] Battery type: Li-ion; Capacity: 6800mAh; Cells: 6-cell; Voltage: 10.95V. Grade A cells ensure fast charges and low power consumption; Built-in circuit protection ensures both safety and stability. 100% New from Manufacturer. Up to 500 recharge cycles over the life of the battery. 24 x 7 email support, 12-month hassle-free warranty. Operation time for standard batteries(6-cell, 6800mah): Around 2 hour 20 minutes, the actual operation time will depend on how much electricity is required by the device and how you use it.