Bay Valley Parts 9 Cell Replacement Battery for Dell 1340 Studio XPS 13 1340 1340N M1340 PP17S 312-0773 Fits part numbers of Dell: 312-0773 P891C T555C Laptop Battery type: Li-ion; Capacity: 87Wh; Cells:9-cell; Voltage: 11.1V;Capacity:7800mah. 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(9-cell 7800mah): Around 3 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. Compatible Models: For Dell 0P878C 0P891C 0R437C 0T555C 0W004C 312-0773 P891C 312-0774 P878C P886C Pp17S R437C T555C T557C T561C U006C U008C W004C replacement notebook laptop battery batteries 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.