It's the Dell Latitude 5580, an all-work-and-no-play powerhouse desktop-replacement you can think of as the XPS 15's corporate cousin. ... and available epic battery life. Best Laptop Picks ...

If the Dell QuickSet feature is installed on the laptop, press the "F3" and "Fn" keys together to see the battery meter. Save your work if the Latitude gives you a low battery warning message ...