Powerku Laptop Battery for Apple A1370 (2010 Version) Li-Polymer battery A1375 For Macbook Air 11" 11.6-inch 020-6920-a 020-6920-b Fit Mc505 Mc506 Mc507 7.3v 35wh 18 Months Warranty A-Grade Li-polymer cell at full capacity health All batteries are tested in the computer and left in there to confirm they will hold a charge over time MSDS/ROHS/UN38.3 Certified and all batteries have been drop tested 24 x 7 email support, weekday phone support during normal business hours Powerku has 10 years of industry experience and offer exception service to our customers.