Detailed Product Description notebook battery, compatible battery for Dell Latitude E6400 E6500 Type: Li-ionVoltage: 11.1VCapacity: 85 Wh Compatible Part Numbers: Dell KY265, MN631,PT434, KY285, FU571, 312-0749. Compatible Notebook Models: Dell:Latitude: E6400/6400 ATG/ E6500 Laptops Precision: Mobile WorkStations M2400/ M4400/ M6400