LB1 High Performance New Dell Replacement Battery for Dell Latitude E6400 ATG, E6410 ATG, E6500, E6510, E6400 XFR, Part #: KY477, KY266, KY268, MN632, MP303 Laptop Notebook [6 Cells 4400mAh 11.1V] Battery Type: Li-Polymer; Capacity: 4400mAh/49Wh; Cells: 6; Voltage: 11.1V 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. Compatible with: Dell Latitude E6400 ATG, E6410 ATG, E6500, E6510, E6400 XFR, Part #: KY477, KY266, KY268, MN632, MP303