Battery for Dell Latitude D800 D810 D820 D830 D830N Laptop Battery Replacement 4R084 0X217 1X793 5P171 0M787 7P806 9X001 [Secondary Media Bay Battery] [Capacity] 4320mAh. [Colour] Black. [Type] Li-ion. [Voltage] 10.8V. [Dimension] 145 x 132 x 14.1(mm). Compatible part number: 4R084, 0X217, 1X793, 310-5195, 312-0068, 312-0191, 312-0102, 312-0085, 5P171, 0M787, 7P806, 9X001, 1312-0069, 312-0122, 310-4345.