Best answer: In our testing we've found it possible to push 7 hours of real-world use on the 4K OLED equipped Dell XPS 15 7590, which is nothing to turn your nose up at.
A beast of a laptop: Dell XPS 15 7590
Huge battery, thirsty display
On paper, the Dell XPS 15 is well equipped for excellent battery life. The higher-spec model comes with a 97Wh battery, which is not only about the biggest Dell can squeeze inside, it's almost the biggest that you're allowed to take on a plane.
But this is one of those situations where size matters, with a choice of two 4K displays on offer. You can either get one with a 4K OLED non-touch or a regular 4K touch display. And when you're pushing that many pixels, your battery will always take a hit.
Surprisingly good performance
That's not to say that you can't get some decent battery life from a 4K equipped XPS 15. During our full review, Executive Editor, Daniel Rubino, found it quite pleasing.
Battery life with the Core i9 is surprising in a good way. If you are using the XPS 15 as a laptop – web browsing, Office, and email – pushing seven hours is possible with the display at 50 percent. That number is not amazing, but for something with a 4K OLED display and quite possibly an overkill Core i9, it is much better than I had expected.
However, it should also be noted that pushing heavy workloads that tax the CPU, GPU, or both, such as gaming or video editing, will see that drop by hours. In these instances, we've seen up to four hours of life, which still isn't bad all things considered.
It comes down to how you use it, like any laptop. If you're getting a 4K display for something like video editing, you'll always need to carry a charger. But that's true of any laptop right now.
A beastly machine that dazzles
The refreshed XPS 15 (7590) for 2019 brings new processors, a faster GPU, and an option for 4K OLED. Plus, the camera is now on the top display. Excellent performance, a large battery, and plenty of configuration options make this one of the best 15-inch "power" laptops on the market.
We may earn a commission for purchases using our links. Learn more.
These are all the best displays for your XPS 15
When the large display found on the XPS 15 just isn't enough to get work done, attaching one of these external displays can vastly improve your productivity with more screen real estate.
Jazz up your XPS 15 with these great accessories
There are so many accessories that can help to enhance your Dell XPS 15 experience that you’d be remiss if you didn’t consider some of them. Here are a few of our favorites.
Use an Ethernet adapter to hook up your Dell XPS 15 to a wired network
The Dell XPS 15 doesn't have some typical ports, including the LAN port. Add fast Ethernet to your laptop with one of these adapters.