Galaxy S8 Battery Life Results: Much Improved

Our full review of the Galaxy S8 and S8+ is live, and both phones shine in terms of display quality, design and performance. But what about endurance? We have good news there, too.

Credit: Jeremy Lips/Tom's Guide

(Image credit: Jeremy Lips/Tom's Guide)

The Galaxy S8+ has a 3,500 mAh battery, which is actually a bit smaller than the 3,600 mAh battery in the Galaxy S7 Edge. And the S8 features a 3,000 mAh battery, which is the same capacity as the regular Galaxy S7. But how long will these new batteries actually last? The results from our testing are pretty impressive.

Galaxy S8 and S8+ Battery Life vs Competition

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PhoneBattery Life (hrs:mins)
Google Pixel XL11:11
Galaxy S8+11:04
Galaxy S810:39
iPhone 7 Plus10:38
Galaxy S7 Edge10:09
iPhone 79:03
Galaxy S78:43
LG G68:39
Google Pixel 8:16
Category Average9:13

Let's start with the S8. That phone lasted an impressive 10 hours and 39 minutes in the Tom's Guide Battery Test, which involves continuous web surfing over 4G. The S7 lasted a much shorter 8:43 on the same test. That's nearly a 2-hour improvement over last year's Samsung flagship.

MORE: Galaxy S8 vs. Galaxy S8+: Which Phone Should You Get?

The S8+ endured for 11 hours and 4 minutes, which is about an hour better than than S7 Edge (10:09). The Galaxy S8+ doesn't quite crack our list of the longest-lasting smartphones, but it only misses out on cracking the top 10 by 7 minutes.

It's important to note that we tested the S8 and S8+ on T-Mobile's network and the S7 and S7 Edge on Verizon's network, which can have an impact on endurance. We will revisit our results once we test Samsung's new flagship on every U.S. carrier.

To put these battery life numbers in perspective, the Google Pixel lasted just 8:16 on our test, while the Pixel XL turned in an excellent runtime of 11:11. The iPhone 7 hit 9:03, and the iPhone 7 Plus notched 10:35. The LG G6 turned in a mediocre 8:39. The average smartphone lasts a little longer than 9 hours, based on our testing.

Battery life is just one factor to consider when buying a phone, but when you take into consideration the S8's superior display, improved cameras and beastly performance, it's easy to see why it's our top smartphone pick.

Mark Spoonauer

Mark Spoonauer is the global editor in chief of Tom's Guide and has covered technology for over 20 years. In addition to overseeing the direction of Tom's Guide, Mark specializes in covering all things mobile, having reviewed dozens of smartphones and other gadgets. He has spoken at key industry events and appears regularly on TV to discuss the latest trends, including Cheddar, Fox Business and other outlets. Mark was previously editor in chief of Laptop Mag, and his work has appeared in Wired, Popular Science and Inc. Follow him on Twitter at @mspoonauer.