Lukk A1375 Laptop Battery for Apple A1370 [Late 2010 Version Only] MacBook Air 11" - Fits MC505LL/A MC506LL/A MC507LL/A + Two Free Screwdrivers & 18 Months Warranty [Li-Polymer 4-cell 5200mAh] Cell type: Li-Polymer; Cells: 4-cell; Capacity: 5200mAh/38Wh; Voltage: 7.3V. Brand New battery directly from the manufacturer. Compact design & Precise cutout perfectly fit your laptop just like the original. Grade A Li-Polymer cells mitigate the risk of battery leakage and maximize output stability. Built-in circuit protection enhances safety of usage and extends battery life. Expected operation time: around 2 hours. The actual operation time will be subject to the way you use it. Up to 500 rechargeable cycles over the battery lifetime. Buy with confidence: CE/FCC/RoHS Certification / 18-Month hassle-free warranty / great customer service leave you no worries after purchase.