Laptop Battery For Dell Latitude E6400 E6410 E6500 E6510 Precision M2400 M4400 M4500 M6500 P/N's: 4M529 KY265 PT434 312-0749 Battery type: Li-ion; Capacity: 7800mAh; Cells: 9-cell; Voltage: 11.1V. 100% New from Manufacturer. Up to 500 recharge cycles over the life of the battery. Brand New Replacement Product, Works as Genuine Parts;