Egoway New Laptop Battery for Apple A1322 A1278 (Mid 2009, Mid 2010, Early 2011, Late 2011, Mid 2012 Version) Unibody MacBook Pro 13" 13.3 Inch, fits 661-5557 661-5229 MB990/A MB990LL/A MB990J/A - 18 Months Warranty [Li-Polymer 6-cell 6000mAh/65Wh] Battery type: rechargable Li-Polymer battery; Voltage:10.95V; Capacity: 6000mAh/65Wh; 6 Cell. Grade A cells ensure fast charges and low power consumption; Built-in circuit protection ensures both safety and stability. About 500 recharge cycles over the life of the battery; CE-/FCC-/RoHS-Certified for safety. Operation time for standard batteries: Around 3 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.