Battery Type: Li-Polymer;
Capacity: 35Wh/5200mAh, Voltage: 7.3V; 4-Cell
Fit for P/N: A1370 A1375 661-5736 020-6920-A 020-6920-B 020-6920-01
Compatible Models: Macbook Air 11 Inch A1375 A1370 (Only2010 Version), MC505, MC505LL/A, MC506LL/A, MC505LZ/A, MC506, MC506J/A, MC506LLA, MC507LL/A
return windows will close after one month, dont worry about it, you can click on seller store on right corner ask a question and contact seller directly for 12 months warranty.