Dell 90 WHr 9-Cell Lithium-Ion Battery for Select Dell Inspiron/Vostro Laptops 4T7JN Battery Type: Li-ion; Capacity: 7800mAh/87Wh; Cells: 9-cell; Voltage: 11.1V 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 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. This product has been tested and validated on Dell systems. It is supported by Dell Technical Support when used with a Dell system. Offers reliable power for dependable performance 90 WHr capacity lets you work seamlessly while on the move Dell uses only OEM grade quality components