Key Power Laptop Battery for Apple A1382 A1286 [Core i7 Macbook Pro 15 inch] - [Compatible with Early 2011 Late 2011 Mid 2012] and 18 Month Warranty [7200mAh/78Wh] Battery type: Li-Polymer; Capacity: 7200mAh/ 78Wh; Voltage: 10.95V 100% New from Manufacturer. Up to 500 recharge cycles over the life of the battery. Grade A cells ensure fast charges and low power consumption; Built-in circuit protection ensures both safety and stability. Worry-free, products are passed CE-/FCC-/RoHS-Certified for safety. NOTE: Please reset SMC and Pram because the batteries's circuit board are up-to-date and customers needs to upgrade the current version with their Macbook Pro laptop. Battery operation time: approximately 2 hour 15 minutes. Actual operation time will depend on how much electricity is required by the device and how you use it.