CSEXCEL New Laptop Battery [Li-ion 14.8V / 58W] for Dell XPS 14z 14z-l412x 14z-l412z Laptop Battery V79y0 V79yo - 18 Months Warrantya Battery type: Li-polymer; Capacity: 3900mAh 58WH; 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,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: the actual operation time will depend on how much electricity is required by the device and how you use it.