Egoway Laptop Battery for MacBook Air 11 Inch A1375 A1370 (Only for Late 2010 Version) Battery Type: Li-Polymer; Voltage: 7.3V; Capacity: 39Wh/5300mAh, 4-Cell. 100% New from Manufacturer, High Performance A1375 Replacement Battery. Overcharger and Discharger Circuit Protection, CE-/FCC-/RoHS-Certified for safety. Contain with Durable cells; Low power consumption IC design; Tested with strict quality control standards; Direct warranty from Manufacturer. Battery operation time: approximately 3 hour. Actual operation time will depend on how much electricity is required by the device and how you use it. Warranty: 18 months free warranty. 24 x 7 professional and efficient email support.