With the Dell Precision 5540, an upgraded workstation with good performance and a design that is similar to that of the XPS 15 series is now available. The 4K option's display shines in our review and the OLED panel does not reduce the battery life by an unreasonable amount of time. However, there are still a few minor drawbacks that users should be aware of.
https://www.notebookcheck.net/Precision-5540-Dell-Workstation-offers-good-battery-life-despite-4K-panel.443920.0.html