LB1 High Performance Battery for Dell XPS 12 Ultrabook, Part#: Y9N00, 489XN, WV7G0, C4K9V, PKH18 Laptop Notebook Computer PC [6 Cells 7.4V 6300mAh] Battery Type: Li-ion; Capacity: 6300mAh/47Wh; Cells: 6-cell; Voltage: 7.4V 100% Brand New from Manufacturer. Rechargeable Up to 500 times over life of battery. Premium Grade A cells ensures peak performance and reliability. Operation time depends on the power consumption of equipment, configuration and how you use it. CE-/RoHS-/FCC- Certified and Built-in circuit protection ensure both safety and stability. Live Support Mon-Fri 4am-8pm PST | Sat-Sun 8am-5pm PST | 18 Months Hassle-Free Warranty.