Egoway New Laptop Battery for Apple A1309 A1297 (Early 2009, Mid 2009, Mid 2010 Version) with Two Free Screwdrivers [Li-Polymer 7.3V 13000mAh] NOTE: This model is a MacBook Pro 5,2 2009 Version and MacBook Pro 6,1 2010 Version A1297 battery, Not a MacBook Pro8,3 2011 Version A1297 battery; Battery Type: Li-Polymer; Voltage: 7.3V; Capacity: 13000mAh; Cells: 9 Cell. The latest updated version Laptop Battery for Apple MacBook Pro 17" A1309 A1297(Early 2009 Mid-2009 Mid-2010 Version); High Performance 13000mAh. 100% New from Manufacturer; Overcharger and Discharger Circuit Protection, CE-/FCC-/RoHS-Certified for safety. Operation time: Around 3.5 hours, the actual operation time will depend on how much electricity is required by the device and how you use it. Warranty: 18 Months warranty, 30 days money return guarantee, 24 x 7 email support.