Description: Capacity: 4000 mAh Voltage: 10.8V (11.1V) Number of cells: 4 Cells technology: Li-Polymer Warranty: 12 months Cells manufacturer: Green Cell Colour: Black Overdischarge protection: Yes Overcharge protection: Yes The possibility of return: Up to 30 days Work time: from 1.5 up to 6h Compatibility list: Compatible with following battery models : 02YVP1,0JHXPY,245RR,2YVP1,JHXPY,T0TRM,TOTRM Compatible with following devices : Dell Precision M3800,Dell XPS 15