ELECBRAiN 10.95V 63.5mAh Replacement Battery for MacBook Pro 13" A1322 A1278 (Mid 2009, Mid 2010, Early 2011, Late 2011, Mid 2012 Version) Battery type: Li-Polymer; Capacity: 63.5Wh; Cells: 6-cell; Voltage: 10.95V. Replace for apple MacBook pro 13.3" A1278 (only for early 2011 2012 mid 2009 2010 late 2011 version) 100% Compatible Non-OEM : Lithium Ion (Li- ion) Long Life Battery: Rechargable with No Memory Effect and Power Surge Protection Grade A cells ensure fast charges and low power consumption; Built-in circuit protection ensures both safety and stability. Elecbrain is focus On Providing Quality Power Products and Excellent Customer Service,24 x 7 Email Support,12 Months warranty, 30 Days Money Back Guarantee!Buy with confidence!