Bad news: 10% worse battery life on Samsung Galaxy S7 and S7 Edge after Android 7.0 Nougat update

The Samsung Galaxy S7 and S7 Edge are two of the most popular Android phones out there, and now, they are getting updated to the latest version of the Android operating system: Android 7.0 Nougat.

Along with all the great new features and improvements, there was one key aspect of the experience that we wanted to test: battery life.

The Galaxy S7 and S7 Edge have traditionally delivered a very good battery life, easily lasting through a full day even when you use your phone a lot. The S7 Edge with its massive 3,600 mAh battery in particular delivered excellent battery life.

So has battery life changed with Android 7.0 Nougat?

We tested both the Galaxy S7 and S7 Edge, expecting to see them perform even better with Google's latest update and improvements. Sadly, we saw the opposite: battery life on both phones has actually worsened by up to some 10%. We have run the tests carefully and double-checked for mistakes, but the results were consistent. Rather than getting improved battery life, the latest and most important update for S7 series actually leads to worse battery life.

Here is our battery testing method: we set all phone screens to a brightness level of 200 nits, a level comfortable for indoor use. Then we run the same test that measures typical smartphone use on all phones.

We have had the Galaxy S7 and S7 Edge in our office for nearly a year now, so we had to first check whether the battery life of the phones has not declined with age. We re-ran all battery tests and found a very insubstantial decline due to the battery age and we have accounted for it in this test.

With all this verified, we happily hit the start button in the software update section and after a while, both phones were running the latest version: Android 7.0, kernel version 3.18.14.

So what were the Galaxy S7 and S7 Edge Android 7.0 Nougat battery life test results?

The Galaxy S7 with the Nougat update scored almost exactly 6 hours of battery life, while just a day before, the same phone running Android 6 Marshmallow scored 6 hours and 37 minutes. This is a 9.4% difference in favor of the pre-update phone.

The Galaxy S7 Edge with Nougat scored 6 hours and 35 minutes on our battery test, while the same phone running on Android 6 Marshmallow scored 7 hours and 10 minutes. There is an 8.1% difference here again in favor of the Android 6 S7 Edge.


The Android 7 Nougat update brings an appreciated visual overhaul of the Galaxy S7 and S7 Edge interface. It makes the system look better, it brings faster and smoother multitasking functionalities, a brand new and hugely improved camera experience, but it also reduces the battery life of the two phones.

It's not possible to blame aging on the reduced battery life: we've specifically tested the phones for age-related reduction in battery life and the little there was, was accounted for. The reduced battery life is thus only due to the Android 7.0 Nougat software update.

As bad as this sounds, what's broken in software can be fixed in software. We'll be looking forward to future updates for the device to see if Samsung manages to undo some of the damage it has done now, and bring back the S7 and S7 Edge battery life we had before the update.

Related phones

Galaxy S7
  • Display 5.1" 1440 x 2560 pixels
  • Camera 12 MP / 5 MP front
  • Processor Qualcomm Snapdragon 820, Quad-core, 2200 MHz
  • Storage 32 GB + microSDXC
  • Battery 3000 mAh(28h 3G talk time)
Galaxy S7 edge
  • Display 5.5" 1440 x 2560 pixels
  • Camera 12 MP / 5 MP front
  • Processor Qualcomm Snapdragon 820, Quad-core, 2200 MHz
  • Storage 32 GB + microSDXC
  • Battery 3600 mAh(36h 3G talk time)



1. TBomb

Posts: 1660; Member since: Dec 28, 2012

Is it possible for the battery to re-improve itself over the course of a couple days or something? Like if it learns how to be more efficient based on your usage?

5. Tyrion_Lannister unregistered

All android phones do that. You are adviced to do a factory reset after a major OS update and use it for one week before testing battery life. But I guess PA is smart enough to do that.


Posts: 322; Member since: Feb 28, 2014

The issue is with Nougat it eats battery for breakfast but then again every major update makes the battery consumption worse than before. To answer the question yes the battery life after a couple of recharges will improve but not by much.


Posts: 1168; Member since: Oct 05, 2015

The exception being kitkat. My battery life on the Z3C took at least a 25% hit going from kitkat to lollipop. Yuck...

63. marorun

Posts: 5029; Member since: Mar 30, 2015

My LG G5 battery life improved from 6.0 to 7.0 lol

104. ebilcake

Posts: 1231; Member since: Jul 16, 2016

That means nothing coming for you

64. xondk

Posts: 1904; Member since: Mar 25, 2014

This generally holds true with most major updates of updates even on iOS, in my book it is mostly new features that haven't had battery saving features properly implemented, and really that is a low priority thing.

41. JC557

Posts: 1925; Member since: Dec 07, 2011

Google's been making promises of efficiency and better battery life only to under deliver or outright fail. Doze still doesn't wprk as well as it should and Google's own processes have wakelock issues, some having gone unfixed since kitkat or lollipop. At least Apple has the tendency to clamp down on background tasks in iOS (taking into account it's somewhat lacking multitasking abilities).


Posts: 1168; Member since: Oct 05, 2015

They should employ Sony stamina mode, as it works far better than doze.

49. JC557

Posts: 1925; Member since: Dec 07, 2011

Wasn't it taken away when Sony updated their phones to MM or Nougat?


Posts: 1168; Member since: Oct 05, 2015

I think it was stripped during one of their Android updates. I think they added it back, to some capacity. It's a shame though, as the older 3rd generation Xperias had stamina modes that work well.

56. Podrick

Posts: 1285; Member since: Aug 19, 2015

Yes, stripped with Marshmallow. Because of Google policy they had to include Doze and I guess Doze and Stamina running together would cause problems so Sony removed it. They brought it back but its not the same as original Stamina mode.

65. marorun

Posts: 5029; Member since: Mar 30, 2015

As i said before.. my battery life impoved on LG G5 from 6.0 to 7.0 lol... My doze also work as expected if i dont use my phone and dont touch it its will loose about 1-3% in a full 8 to 12 hours night. When i have it on me and dont use it its go a bit faster at about 1% an hours. ( i have 3 email sync on it )

75. JC557

Posts: 1925; Member since: Dec 07, 2011

Meanwhile you can do a quick google search showing that a lot of people are experiencing wakelock issues or frustrated with the battery consumption of Google services on various versions of Android and on various devices running Android even the Nexus and Pixel lines where they don't have 3rd party skins to deal with. The sooner Android fans stop defending them and downplaying the issues the better it will be for everyone using the OS.

68. sgtdisturbed47

Posts: 970; Member since: Feb 02, 2012

According to Android fans, updates for iOS are broken and improve nothing. Meanwhile every Android update I've gotten required me to totally wipe the device afterward to partially fix issues with battery, connectivity, and performance. Never had to do that with any iOS update, and even while jailbroken it's been more reliable than KK, LP, and MM updates I've received on my Android devices. I guess mine is an isolated incident, though.

81. sissy246

Posts: 7129; Member since: Mar 04, 2015

Out of all the Samsung phones I have had , my husband and my son we have never had to do a full factory reset after a update.

74. rubyonrails3

Posts: 375; Member since: Oct 01, 2014

Who knows Samsung did deliberately so users switch to new phone

83. rf1975

Posts: 264; Member since: Aug 01, 2011

My Google Nexus 5X dead after update. Thanks Google.

109. Daniel7

Posts: 28; Member since: Nov 05, 2016

Hello, Tyrion. I really like all of those comments you posted on PhoneArena, especially on those HFR video articles, where you deeply analyzed and mentioned everything. Should we not expect the opposite (better battery runtime) from the lower rendered screen resolution?

110. Tyrion_Lannister unregistered

lower rendered screen resolution doesn't do much for regular usage since the screen still has to push as many pixels. A 1080p panel consumes less power than a 1440p one, but a 1440p panel running at 1080p will consume the same power as a 1440p one. The only power savings you will get will be while gaming or doing anything GPU intensive, else the battery life will be about the same.

62. marorun

Posts: 5029; Member since: Mar 30, 2015

Nougat have a lots of white and less dark in its UI so yep amoled dont like those. Still very good battery life. funny on my LG G5 i gained about 10-15% battery life not the other way around.

72. remixfa

Posts: 14605; Member since: Dec 19, 2008

Yes, the first couple of cycles after a major OS update are generally shorter lasting. should run it down to empty once or twice, fill it up, then do the battery test. All of this is also under normal consumption. Dont forget there are samsung lower power modes which drastically improve life on top of the standard life. Hell, I run my note 4 in Power Saving mode at all times. Everything still runs fine and I get a few extra hours of time.

79. max1c

Posts: 103; Member since: Oct 11, 2014

No. I've had 7 on my GS7 for a while now and the battery is not getting better at all.

2. Tyrion_Lannister unregistered

GSMArena test also showed significant decrease in battery life on S7 and S7 edge. Same happened with my Oneplus 3, battery life took a significant hit after nougat update. Then again, it's been happening since kitkat. Battery life takes a dive after each android update. I guess in a few years we will be measuring android battery life in minutes rather than hours.

13. jellmoo

Posts: 2660; Member since: Oct 31, 2011

Anecdotal tests on my Axon 7 show relatively the same active use battery life, but a big dip in standby battery.

20. KingSam

Posts: 1505; Member since: Mar 13, 2016

My standby time is garbage on nougat. Even though it's Lineage not official.

44. JC557

Posts: 1925; Member since: Dec 07, 2011

I keep seeing the awake bar in the battery stats grow larger than the screen on bar despite turning off all useless apps and Google services are the culprit even on a fresh full reset.


Posts: 1168; Member since: Oct 05, 2015

That's why I think I'll get a xiaomi next go round. As Google Apps aren't baked into the ROM, things like greenify and system battery savers can reign in gapps and stop all that chaos they cause in the background.

17. Macready

Posts: 1830; Member since: Dec 08, 2014

The S5 Plus here actually improved a lot in terms of battery life, after the 6.0 update. Same for the S2 Tab, mostly thanks to much improved handling of background processes.

22. AmashAziz

Posts: 2934; Member since: Jun 30, 2014

S5 Plus?

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