LQM 14.8V 4400mAh/65Wh New Laptop Battery for Dell XPS 15z L511Z,Compatible P/N:0HTR7 0NMV5C NMV5C 075WY2 100% Brand New - 8 cell,14.8V,4400mAh/65Wh Li-polymer Battery Replacement for :Dell XPS 15z 0htr7 0nmv5c Nmv5c Cn-075wy2 75wy2 Operation time: the actual operation time will depend on how much electricity is required by the device and how you use it. 12 Months Warranty,30 days money return guarantee!