Samsung Galaxy S9 and S9+ battery test results are out

Samsung Galaxy S9 and S9+ battery test results are out
Our in-depth Samsung Galaxy S9 and S9+ review is out and the verdict is in: the S9 series are great phones, but they are all about minor improvements over the S8 rather than any radical changes.

Out of all the new features, though, we wanted to take a separate look at one key element of the S9 experience: battery life. Is it any better than on the Galaxy S8 or Note 8 series? And how does it compare to other flagship phones in 2018?

We've been using the two new Galaxy S9s for more than a week now and our real-life impressions about battery life are that you still need to go to the charger every night. Yes, the S9 will last a long day on a single charge, but they will not last a full two days for those who use their phones a lot.

Battery life test results


In order to confirm these impressions, we also ran out proprietary battery test on the new S9 family. For this test, we set all phones at the same brightness level to equal the playing field. Here are the results that we got:

Battery life (hours) Higher is better
Samsung Galaxy S9 7h 23 min (Good)
Samsung Galaxy S8 8h 22 min (Excellent)
Samsung Galaxy S9+ 8h 5 min (Excellent)
Samsung Galaxy S8+ 8h (Excellent)
Samsung Galaxy Note 8 7h 50 min (Good)
Apple iPhone X 8h 41 min (Excellent)
Apple iPhone 8 Plus 10h 35 min (Excellent)
Apple iPhone 8 8h 37 min (Excellent)
LG V30 9h 34 min (Excellent)
Google Pixel 2 8h 40 min (Excellent)
Google Pixel 2 XL 8h 57 min (Excellent)
OnePlus 5T 8h 51 min (Excellent)
Huawei Mate 10 Pro 12h 5 min (Excellent)

As you can see, there is actually a decline in the battery score when you compare the S9 series to the S8. We can attribute this to the more powerful chip on the S9 series that draws more power, but relies on the same 10nm manufacturing technology. For all else, the Galaxy S9 has a 3,000mAh battery, same as on the S8, and the S9+ has a 3,500mAh cell, the same capacity as on the S8+. Samsung's official battery numbers speak of an unchanged battery performance, in case you were curious.

But how does the S9 series compare to the other top-tier phones? Not all that great actually. Its score was actually the lowest of them all, and often by a big margin, so keep that in mind when you consider buying the newest Galaxy.

Time to recharge


There is one other important aspect of the battery experience and that is charging times. The new S9 and S9+ both support Samsung’s Fast Adaptive Charge and come with a fast charger in the box. Last year’s models also supported the same functionality.

We also tested the time it took for the phones to get from 0 to 100% charge using the charger in the box, and we found no change. Both the S9 series and the S8 series top up in around 1 hour and 40 minutes, give or take a few minutes.

Charging time (minutes) Lower is better
Samsung Galaxy S9 107
Samsung Galaxy S8 100
Samsung Galaxy S9+ 105
Samsung Galaxy S8+ 99
Samsung Galaxy Note 8 102
Apple iPhone X 189
Apple iPhone 8 Plus 178
Apple iPhone 8 148
LG V30 108
Google Pixel 2 111
Google Pixel 2 XL 152
OnePlus 5T 93
Huawei Mate 10 Pro 102


Also, both the S9 and S8 series support wireless charging.


You don’t get a wireless charging pad in the box, but Samsung sells chargers separately, and they look awesome, support fast wireless charging, and allow you to have your phone in an upright position, so they double as a dock as well.

Related phones

Galaxy S9+
  • Display 6.2" 1440 x 2960 pixels
  • Camera 12 MP / 8 MP front
  • Processor Qualcomm Snapdragon 845, Octa-core, 2800 MHz
  • Storage 64 GB + microSDXC
  • Battery 3500 mAh(35h talk time)
Galaxy S9
  • Display 5.8" 1440 x 2960 pixels
  • Camera 12 MP / 8 MP front
  • Processor Qualcomm Snapdragon 845, Octa-core, 2800 MHz
  • Storage 64 GB + microSDXC
  • Battery 3000 mAh(31h talk time)

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42 Comments

1. fyah_king unregistered

I don't get it with your battery results. I have the S8+ and wife has s8. My s8+ last longer than hers. Lol

10. TechSceptic

Posts: 1156; Member since: Feb 05, 2018

Phonearena battery tests are very inaccurate. I'm not sure how they test it, but it has consistent proven to be inaccurate. An example would be my S6 edge. It scores quite favorable in their battery test, even tho the S6 edge was known for its awful battery life, as even the older S5 had a better battery life.

28. ph00ny

Posts: 2053; Member since: May 26, 2011

There is something wrong with PA's battery tests. It's been said over and over again in the comment section for quite some time now Gizmodo "The S9+’s new chip has also had a serious impact on battery life too. Despite having a 3,500 mAh battery which is the same size as the power pack in last year’s S8+, the S9+ lasted more than an hour and a half longer en route to an impressive time of 12 hours and 27 minutes on our rundown test. Going strictly by the numbers, that’s better than every phone I reviewed last year, aside from the Asus Zenfone 4 Max’s time of 16:13. But that phone’s only talent is its ridiculous longevity." Engadget "Summary Samsung’s improvements to its latest flagship work as promised, but don’t feel like features that you’d miss by not upgrading. Still, thanks to blazing performance, solid cameras and long battery life, the Galaxy S9+ continues to uphold the S series’ reputation for excellence."

44. schwaggins

Posts: 1; Member since: Apr 02, 2018

In real world comparison the bigger battery provides much longer screen off use e.g standby, bluetooth/listening to music, talk time etc

2. Zylam

Posts: 1817; Member since: Oct 20, 2010

Worse than last year LMAO. "Upgrade".

7. umaru-chan

Posts: 371; Member since: Apr 27, 2017

Its worse than s8. s9 is shaping up to be even more disastrous than my initial estimation.

14. AustinPaul

Posts: 155; Member since: Dec 13, 2011

"Disastrous" - please.

3. drunkenjay

Posts: 1696; Member since: Feb 11, 2013

trusting phonearena's battery life test is like believing that the world is flat. I'll wait for gsmarena thanks.

40. Settings

Posts: 2943; Member since: Jul 02, 2014

In comparison with GSMArena, PA is true about S9's battery worse than S8 and even S5 and the S6+.

4. Ciro1900

Posts: 591; Member since: Dec 17, 2017

Lol 0 innovation and menoa autonomy the s9 goes like crabs

5. TechSceptic

Posts: 1156; Member since: Feb 05, 2018

You shouldn't really rely too much on Phonearena's battery tests, they have proven to be quite inconsistent and not really indicative of the real battery life. Hell, even this is more accurate a test, which shows slightly improved battery life for the S9, which makes sense, as the S9 is created on an improved 10nm architecture. https://www.youtube.com/watch?v=a6kLLqPPi1c If you doubt that they're inconsistent, then try adding the S6 edge to the battery life table. That phone had the worst battery life out of all of Samsung's phones within these last 3 years, and yet it beats most of the newer models. If you go to other sites, then you will see that the S6 edge loses to every single samsung phone that was released after it, which is how it should look like, as the S6 edge has awful battery life. I know, i have it.

6. EvilAPi

Posts: 116; Member since: Sep 25, 2017

OK. I still believe non-biased battery life from GSMArena since few years ago. Have a good day! Btw, why you block some user comments who said the truth about notch? Hmm....

8. duckofdeath unregistered

They are in full fruity toy marketing mode this week. Every announcement about a notch phone is filled with keyboard diarrhea about plagiarism, rambling about how their favourite brand now has invented the idea. Compare that to every post about new phones with an infinity display. Try to find a single mention of Samsung in those.... :) This is after all iPhoneArena.

9. TechSceptic

Posts: 1156; Member since: Feb 05, 2018

Here is a battery test which completely contradicts the battery tests of Phonearena, which has proven to not be super accurate, so if you're interested in another source for the battery life, then check this out. https://www.youtube.com/watch?v=1jMnpHtK1Zg

11. chris2k5

Posts: 281; Member since: Nov 17, 2012

Omg WORSE THAN LAST YEAR. Samsung is a joke this year.

17. LikeMyself

Posts: 631; Member since: Sep 23, 2013

U know it's inaccurate & unreliable when the s8+ & s9+ score lower than their smaller versions when in real life the plus versions have way better battery life. Anyways both s8 & s9 battery is a big big joke!

18. Ciro1900

Posts: 591; Member since: Dec 17, 2017

The Samsung Fanboy do not believe in the tests of phonearena but if the tests bought of fake diaplaymate and fake dxomark

25. Medoogalaxy

Posts: 232; Member since: May 25, 2017

Those are professionals although Samsung doesn't need Displaymate or dxomark rating because Samsung users live in real, they know its display camera and battery they are not waiting fake phonearena tests

27. Ciro1900

Posts: 591; Member since: Dec 17, 2017

Displaymate is a web that sells usbs and dxomark sell rewiews They are not professionals at all, just to make money

19. kunme

Posts: 5; Member since: Dec 29, 2017

S9 worser than S8. dam Samsung.

20. wesley.

Posts: 217; Member since: Aug 06, 2013

This is a no go. Poor battery life and sky high price.

21. shield

Posts: 852; Member since: Sep 12, 2015

LG V30 Best QHD+ and 3300mAh best batteri life, Mate 10 Pro good, but only FHD+ and 4000mAh.

22. sissy246

Posts: 7124; Member since: Mar 04, 2015

And all you apple fanboys get upset when Samsung fans go in apple articles but, here you are. Oh, thats ok for you to do it, guess I forgot.

24. Einstein333

Posts: 146; Member since: May 22, 2012

Now that's embarrasing for a 2018 flagship ! And certainly a deal-breaker for me !

26. maku2017

Posts: 11; Member since: Jan 19, 2017

why in here the iphone x leading than lg v30 but in youtube all of the tech youtuber show lg v30 is the winner no one can beat the lg v30 in battery stress test

29. JMartin22

Posts: 2372; Member since: Apr 30, 2013

Their testing methodology must involve a lot of white backgrounds or high APL imagery content. Their battery results are always different from other sites’ and people’s own personal experience with the longevity of the device. Something is clearly off and unrealistic

31. cheetah2k

Posts: 2271; Member since: Jan 16, 2011

Ill be sticking with my V30+ then

32. monoke

Posts: 1172; Member since: Mar 14, 2015

Lol. My old as dirt Xperia Z3 has 2+ hours more battery usage than the S9's... It's 2018 and that shouldn't be happening with any phone... It's pathetic really.

34. Marcwand3l

Posts: 446; Member since: May 08, 2017

I don't understand how it's technically possible for the S8 to have a better battery score than ever single other high end Samsung phone including: the s9+, S8+ and Note 8 which al have bigger batteries.

36. Swsko

Posts: 15; Member since: Mar 09, 2018

I have the exynos s9+ and on my first charge it lasted 29hours with 6h19mn with sot and that's with wifi all the time, AOD and gmail synching and auto brightness

* Some comments have been hidden, because they don't meet the discussions rules.

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