LB1 High Performance New Laptop Battery for HP Envy 17 Notebook HP Envy 17 for Computer HP Envy 17 [6600mAh 9 Cells 11.1V] Battery Type: Li-Ion; Capacity: 6600 mAh/72Wh; Cells: 9; Voltage: 11.1 V Premium Grade A cells ensures peak performance and reliability. Operation time depends on the capacity of the battery, laptop settings, power consumption of equipment, 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. Battery for HP Envy 17