Powerku&reg; Laptop Battery for Apple A1342 (Late 2009, Mid 2010) Li-Polymer battery A1331 For Macbook Pro 13" 15" 13.3-inch 15.4-inch Mc233 Mc234 Mc207 Mc375 Mc516 10.95v 63.5wh 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.