Coolgo New Laptop Battery for Laptop/Notebook Battery for Dell Inspiron 13 1318 pp25l [Electronics] - 18 Months Warranty [li-ion 6-cell 5200mAh] High-Quality laptop battery replacement for Dell xps M1330 11.1V 5200mAh Black Quality Certication: All the products pass the ISO9001, CE and ROHS, FCC multiple international authentication and completely accord with environmental protection requirement. Consummate Design: Excellent design makes the product not only has the overcharge, discharge and short circuit multiple protection, but also to balance charge-discharge of all the internal cells. Free shipping via USPS first class package from USA, 24 x 7 Email Support. Brand new direct from Professional Manufacturer, 18 Months warranty! Operation time: For standard battery(6-cell, 4400mah): 2-3 hours; for extended battery(12-cell, 8800mah): over 4 hours (Note: The actual operation time depends on how much electricity is required by the device and how you use the battery.)