CSEXCEL New Laptop Battery [Li-Polymer 14.8V / 64W] for Dell XPS 15z L511Z Laptop 0HTR7 0NMV5C NMV5C 075WY2-12 Months Warrantya Battery type: Li-polymer; Capacity: 64WH; Cells: 8-cell; Voltage: 14.8V. 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,12-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: the actual operation time will depend on how much electricity is required by the device and how you use it.