BRTONG High Performance Laptop Battery for Apple Macbook Air 11 Inch 2010 Battery A1375 A1370 (2010) 661-5736 020-6920-A 020-6920-B MC505 MC506 MC505LL/A MC506LL/A MC507LL/A - 18 Months Warranty Compatible Models: Apple Macbook Air 11 Inch A1370(Only for Late 2010 Version), A1375, MC505, MC505LL/A, MC506LL/A, MC505LZ/A, MC506, MC506J/A, MC506LLA, MC507LL/A Compatible part number: 661-5736 / 020-6920-01 / 020-6920-A / 020-6920-B Battery type: Li-ion; Capacity: 5000mAh/35Wh; Cells: 6-cell; Voltage: 7.3V Operation time for standard batteries: Around 2.5-3 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, 18-month hassle-free warranty