This Dell Equivalent Latitude D820 Battery Is rated at 49Wh 11.1V and 4400mAh 8 cell to meet or exceed the original OEM Dell battery. This battery will replace the Dell Latitude D820 Battery and works with the following Laptops/Notebooks:Dell Latitude D531, Latitude D531N, Latitude D820, Latitude D830, Precision M65, Precision M4300, and the following battery Models:310-9122, 310-9123, 312-0393, 312-0394, 312-0401, 312-0402, 312-0537, 312-0538, 451-10308, 451-10309, 451-10326, 451-10327, 999C5830F, 999C6570F, 0HR048, CF623, CF704, CF711, CR160, CW666, CW674, DF192, DF230, DF249, FF231, FF232, GR932, GX047, HR048, HX306, JT784, MM156, MM158, MM160, MM165, NX618, OM787, RX220, WN791, WN979, XD735, XD736, XD739, YD623, YD624, YD626, YW652, YW670.
