TechOrbits Laptop Battery for Apple A1331 A1342 MacBook Pro, MacBook Air MC234LL/A MC233LL/A 13.3-Inch (Macbook 2008 & Macbook 2009 Versions Only) 661-5391 020-6580 - 3 years Warranty [Li-Polymer 6-cell 5200mAh] Longest Warranty: TechOrbits batteries are built to last; that's why we cover our batteries with an industry best 3 years warranty. Premium Components: Our batteries are beautiful on the inside and out! This battery features a Texas Instrument main board, state of the art over circuit protection, and highest grade li Polymer Cells. Energy Efficiency: Max Utilization Technology insures that the battery is always in-sync with your power settings to give you maximum battery life for every charge. Over 1 million+ happy customers since 2010 Battery type: Li-Polymer; Capacity: 5200mAh; Cells: 6-cell; Voltage: 10.95V; Screw Drivers Included