Battery Energy+ brand Li-Ion 9 cell for Dell Latitude D531, D531N, D820, D830 series and Dell Precision M65 series replaces part numbers 312-0393, 312-0394, 312-0401, 312-0402, 312-0538, CF623, CF704, CF711, CR160, DF230, DF249, FF231, FF232, MM165, RW220, XD735, XD736, XD739, YD623, YD624, YD626. "11.1V 7200mAH Fully Charged and Tested 1 year Warranty"