Batterytec&reg; Laptop Battery for DELL Latitude E5440 E5540, DELL Latitude 14 Series, DELL Latitude 14 5000 Series, DELL Latitude 15 Series, DELL Latitude 15 5000-E5540, 312-1351 451-BBID 451-BBIE 451-BBIF 3K7J7 970V9 9TJ2J N5YH9 TU211 VV0NF. [11.1V 4400mAh 1 Year Warranty] Battery Type: Li-ion, Cells: 6-cell,Capacity: 4400mAh; Voltage: 11.1V. 100% New Manufacturer. To 500 charging cycles during the lifetime of the battery. CE-/FCC-/RoHS-Certified for safety. 24 x 7 email support, 12 months Warranty without problems. Class A cells provide fast loads and low power consumption, chip protection offers both security and stability.