Anker&reg; New Laptop Battery for Dell XPS 14 / 15 / 17 / 14D / 15D / 17D / L401X / L501X / L701X / L701X 3D, Fits P/N 312-1123 312-1127 453-10186 J70W7 JWPHF R795X WHXY3 - 18 Months Warranty [Li-ion 6-cell 4400mAh] Battery type: Li-ion; Capacity: 4400mAh; Cells: 6-cell; Voltage: 11.1V. 100% New from Manufacturer. Up to 500 recharge cycles over the life of the battery. CE-/FCC-/RoHS-Certified for safety. 24 x 7 email support, 8-hr x 5-weekday call support, 18-month hassle-free warranty. Grade A cells ensure fast charges and low power consumption; Built-in circuit protection ensures both safety and stability. Operation time for standard batteries(6-cell, 4400mah): Around 2 hours, the actual operation time will depend on how much electricity is required by the device and how you use it.