LB1 High Performance 6600mAh Battery for Dell Latitude E5540 E5440 Fits 0M7T5F 0FT6D9 7W6K0 CXF66 F49WX VVONF Battery Type: Li-ion; Capacity: 2600mAh/38Wh; Cells: 4-cell; Voltage: 14.8V 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. The battery is compatible only with Latitude E5540 Latitude E5440 and part numbers 	0M7T5F	0FT6D9	0K8HC	1N9C0	7W6K0	CXF66	F49WX	NVWGM	VJXMC	VVONF	WGCW6