BRTONG Laptop Battery for Apple MacBook Air 13 inch A1377 A1466 A1405, also fit A1369 A1496-12 Months Warranty [Li-Polymer 7.6V 55Wh] Compatible Models: for Apple 13 Inch MacBook Air (2010, 2011, 2012, 2013, 2014 Version) Only! Compatible part number: MC503LL/A / MC503 / MC503ZP/A / MC503LZ/A / MC503LL/A / MC503E/A / MC503B/A / MC504LL/A / MC504 / MC965LL/A / MC966LL/A / MD231LL/A / MD232LL/A / MD760LL/A / MD761LL/A / MD760LL/B / MD761LL/B Battery type: Li-Polymer; Capacity: 7200mAh/55Wh; Cells: 4-cell; Voltage: 7.6V Operation time for standard batteries: Around 2.5-3.5 hours, the actual operation time will depend on how much electricity is required by the device and how you use it CE-/FCC-/RoHS-Certified for safety. 24 x 7 email support, 12-month hassle-free warranty