ATC Extended Battery Replacement for DELL Latitude E6400, Latitude E6500, precision M2400, precision M4400 series (6-Cell Equivalent) Battery type: Li-ion; Capacity: 58Wh; Cells:6-cell; Voltage: 11.1V;Capacity:5200mah. Compatible Models: For Dell Latitude E6400 Latitude E6500 Latitude E6510 Latitude E6410 Latitude E6400 ATG Latitude E6400 XFR Latitude E6410 ATG Dell Precision M2400 Precision M4400 Precision M4500 Compatible Part Numbers: 312-0748 312-0749 312-0753 FU441 FU444 FU571 HJ590 KY265 KY266 KY470 KY471 KY477 NM631 MP492 MP494 PT43 PT434 PT436 PT650 PT653 R822G WG351 XP394 replacement notebook laptop battery batteries High quality grade "A" cells. Charges quickly. Longer discharge time. Steady output and low power consumption. More than 500 times charge-discharge cycles.All products are Certified by CE ROHS UL1642 FCC for safety. Operation time for standard batteries(6-cell 5200mah): Around 2 hours the actual operation time will depend on how much electricity is required by the device and how you use it. 24 x 7 email support 12-month service. 12-months hassle-free warranty service. Please check if this battery is compatible with your computer before purchasing. Part numbers of compatible batteries and Computers are listed as following.