SLODA New Li-ion Polymer 020-6955-A Battery For Apple MacBook Air 13" A1369 (Late 2010) A1377 MC504 MC503 [Li-Polymer 7.3V 50Wh] Battery Type: Li-Polymer; Voltage: 7.3V; Capacity: 50Wh 6700mAh; 4 Cell. 100% New from Manufacturer, High Performance A1377 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. Warranty: 30 days money return guarantee; 24 x 7 email support.