Dell 8M039 Precision Mobile Workstation M6400 Precision M6400 M6500 Battery -  Compatible Part Numbers:  8M039, C565C, DW842, F678F, KR854 - Battery Type: Li-ion, Battery Volt: 11.1V, Capacity: 90Wh, Battery Color: Black, Condition: 100% New, Warranty: 12