Dtk New Laptop Battery for Apple A1321 A1286 (Only for 2009 2010 Version) Unibody Macbook Pro 15'', Fits Mb985 Mb986j/a Mc118-12 Months Warranty [Li-polymer 6-cell 6800mah/74wh] 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 hours, the actual operation time will depend on how much electricity is required by the device and how you use it.