Gasky Battery for Apple A1322 A1278 (2009 2010 2011 2012 Version) Unibody MacBook Pro 13'', MB990LL/A MB991LL/A with Free Screwdrivers 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. CE-/FCC-/RoHS certificated for safety,18 months warranty,professional technical support, efficient and always satisfied customer service 24 x 7 email support. 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.