Battery Life: Good (60Hz) to Average (120Hz)

Last week we had published our initial battery life report on the S20 series, with some interesting findings. First of all, what needs to be mentioned again is that the new 120Hz display modes on the phones come with a quite large battery life impact. The behavior is exhibited on all our S20 models at hand and I think it’s likely due to the panel itself or the DDIC. Samsung had included various display refresh modes varying from 48, 60, 96 and 120Hz, however we have yet to find evidence of any mechanism that actively switches between the various modes. 

Device-On Black Screen Power Consumption (Airplane Mode)

As such, even on a black static screen, running at 120Hz comes with a quite steep power penalty that’s always present whenever the display is on, costing around 160mW of power.

I had noted that I found our variant of the Snapdragon 865 Galaxy S20 Ultra to have worse idle power than our Exynos phone version. Initially I had attributed this to possibly the SoC or even the nature of the external X55 modem, but since then I’ve also received an LG V60 and that device’s idle power is perfectly normal. The only other thing that differentiates our S20 Ultra here is the fact that it has the extra mmWave antennas and RF systems. It would be interesting to see if non-mmWave variants of the Snapdragon S20 Ultra behave any differently (Tip at our Chinese or Korean readers).

I also had made mention that the “Performance” mode of the Exynos S20 phones seemingly behaved quite overzealously in terms of its scheduling settings, and there was a quite drastic increase in power draw for what was not nearly an as drastic increase in performance. I’ve rerun the battery tests in the “Optimized” settings which doesn’t have the “Increased system speed” option enabled, and I’ve confirmed my suspicion as the battery life figures did improve by some notable amounts. I’ve also tested the Snapdragon in the “Optimized” setting and the runtimes only differed by 2% - for users having the Snapdragon versions it’s thus safe to simply leave that enabled.

Web Browsing Battery Life 2016 (WiFi)

In our web test, the new S20 series end up right about where you’d expect them to. The Snapdragon 865 Galaxy S20 Ultra at 60Hz fares the best amongst the tested models, and now represents Samsung’s longest lasting flagship device. Slightly behind it we find the Exynos S20 Ultra at 60Hz. The difference between the two phones here isn’t very big in this test, and I attribute this to the higher constant idle power draw of the Snapdragon phone which counteracts the much higher compute efficiency of the SoC. The Eyxnos S20+ ends up slightly behind the S10+ phones, but still lasts a good 12.65h in this test.

Once we turn on the 120Hz display modes, the battery life results on all the phones drops quite notably. The Snapdragon S20 Ultra goes from 14h to 11.3h, a 20% drop. The same applies to the Exynos S20 Ultra, with a 20% drop, but for some reason the S20+ sees a larger drop of 25%. In the systems performance section I did mention that there’s some software configuration differences between the Exynos S20 Ultra and S20+, maybe some of that plays part here in the results.

PCMark Work 2.0 - Battery Life

Overall, the conclusion on battery life isn’t quite as black & white as we thought it would be. The key point is to stay away from the seemingly broken Performance mode on the Exynos chipset and you’ll have roughly similar battery life results between the two SoC variants of the S20. Naturally, that’s only being achieved by the fact that the Exynos does showcase worse performance, saving energy by using the more efficient lower performance states more.

What’s valid for all variants of the phones is that the 120Hz display mode is quite the power hog. Samsung probably has the opportunity to improve this by introducing a better managed variable refresh rate mode that actually changes between the different refresh rates based on content, something that seemingly isn’t happening right now. Also switching to lower refresh rates when showcasing static content would be a huge power saver, but I’m not sure if Samsung would be able to actually deploy such a mechanism.

Display Measurement Camera Architecture: Huge New Sensors
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  • crimson117 - Friday, April 3, 2020 - link

    $1400 is absurd. There's no way they're worth more than twice as much as a brand new S10. Reply
  • Andrei Frumusanu - Friday, April 3, 2020 - link

    Probably one of the reasons Samsung still continues to sell the S10 series. They're really excellent value right now, and you're not missing out on too much. Reply
  • cha0z_ - Monday, April 6, 2020 - link

    You are literally getting just one more year of software support going for s10 series... samsung software support policy is abysmal with less than two years of real support and from there just security. I got both iphone 11 pro max and exynos note 9, if I put aside the cr*ppy 9810 - it will not receive even the oneUI 2.1 as an update, while samsung will soon release it for s10 line. Enough said, note 9 is year and a half old.

    How can you recommend someone 1000 euro or 1400 euro phone if it will be supported for 1.5 years and from there 1.5 more security updates next to apple with 5 years FULL support with major, minor, day one, betas + security update for old iphones like 4s and 5 (2011 and 2012 respectably)?
    Reply
  • goatfajitas - Monday, April 6, 2020 - link

    You do realize the phone doesn't stop working when it doesn't get an OS update right? TBH, neither Android or IOS has added a whole lot in the past few years, its just a yearly cadence of very minor updates and not getting them means almost zero in actual use. Reply
  • Featherinmycap - Monday, April 6, 2020 - link

    I think there have been a lot of added features to IOS in the last 3 years that I use a great deal. Not saying that Android didnt already have some of these features, but for IOS users we got with IOS 11; a file manager (finally), Messages sync with iCloud, screen recording, useful improvements to Siri and ApplePay. IOS12; lots of performance improvements (lots), Screentime, Shortcuts (scripting), CarPlay, Animoji Memoji, Tracking prevention, IOS13; Single Sign on, external storage, Dark Mode, better support for keyboards, trackpads/mice, etc. Reply
  • Famorcan007 - Tuesday, April 7, 2020 - link

    I think it's because Android mostly has offered those features(file manager,screen recording, external storage,support for mice etc.) since way back compared to iOS' slow but steady trickle of features that's why iOS users feel every OS update is huge and significant. I'm using a Note 4(my backup device) right now to comment which doesn't feel too crippled compared to my Android 9 P20 pro. Reply
  • cha0z_ - Tuesday, April 7, 2020 - link

    Let's not find an excuse - software support is software support. Security is security - some of us keep all their personal info on their device (most of us) + bank accounts and whatnot, risking compromise on your phone is not that innocent compared to what was like back in the days. IOS adds rapidly more features for sure compared to android that recently starts to look more and more like IOS (and I personally totally don't like that), but still added some good stuff under the hood and some new features.

    It's not serious to sell 1400 euro phone that is supported for one year and a half. I own exynos note 9 - it's 1.5 years old and already samsung dropped the support, s10 line received oneUI 2.1, note 9 will not. How is that for my 1000 euro phone + double served with that cr*ppy exynos 9810 in it. Now it's in my GF and I am rolling iphone 11 pro max. I prefer android and love oneUI, but I am tired to be a second hand customer.
    Reply
  • s.yu - Tuesday, April 7, 2020 - link

    Don't know what you're talking about. My Note8 just got another update days ago, one that I preferred not to have because each update comes with a risk of bricking the device while potential changes to the UI are not always welcome either. I also got it ~30% off retail a few months after release, such has always been the state of Samsung, at least for S and Note.
    I'm no longer buying Samsung but the main reason is lack of the 3.5mm port, if I have to name another then it's between the questionable choice of telephoto in the smaller variants or the oversized device with a mediocre battery(I regard 5000mah to be mediocre for the size). I still do like the UI but I'm willing to look around.
    Reply
  • Psyside - Tuesday, April 7, 2020 - link

    "It's not serious to sell 1400 euro phone that is supported for one year and a half. I own exynos note 9 - it's 1.5 years old and already samsung dropped the support, s10 line received oneUI 2.1, note 9 will not. How is that for my 1000 euro phone"

    Very easy, with those "very old software features" Samsung can do what MAC can't, and don't get me start it on the utter crap IOS.

    Also don't spin it, Samsung offer 4 (four) years of security updates, so do your research before you type something.
    Reply
  • cha0z_ - Wednesday, April 8, 2020 - link

    fanboy. Security update hahahahah iphone 4s and 5 still receives security updates - 9 years old phone for 4s. What you will say now?
    iphone receive FULL support with MAJOR ios versions, updates, minor updates, BETA versions, DAY ONE as their newest and most expensive phone - for 5-6 years and you are talking about 4 years of security updates roflmao. Samsung released note 9 with android 8 when android 9 was already released from more than a months. Oooo, it's enough time, because you can dev your skin and features on top of the dev previews, especially the later ones that are closer to final (for the more tricky/deeply integrated code) - so no excuse for what they did. Basically they gave me one major update - android 10 as android 9 should had been on the note 9 from the start. Even if we count 2, how is that next to 5-6 versions of ios?

    And before you talk some more fanboy bs that never used recent years iphones - ios brings a lot more in every new versions (adding features that was missing for no reason, like external USB flash support, file browser for the files on the phone, etc) while android 10 brings you what? More lockdown ios style, iphones gestures and pixel device that is a cheap iphone wannabe.

    Because of people like you samsung don't want to change their software support policy. Why should they? It costs money or now you will start with the argument how the phone hardware is not supporting oneUI 2.1 (for the note 9 that is 1.5 years old, but will not receive it most likely ;) ). Or maybe android 11 will be too much for the phone, right? :D

    Also I agree - my note 9 can do more than my iphone 11 pro max, but everything that the phones do both (and that's 99.9% of what you will end up using constantly) - the iphone 11 pro max makes the exynos note 9 look like a total utter joke - faster, smoother with NOT A SINGLE frame drop no matter what you do, gaming is insanely good with surprise - NOT A SINGLE frame drop, battery life is x3 times better, apps have MORE features and runs super smooth and great, speakers destroys the note 9 one, camera too is times better, materials are a lot better too, faceid is super good and fast - feels like I don't have any security on - never failed or gave me any issue. Fun fact, note 9 came with fortnite and recommended as gaming phone for that game. My exynos variant can't run smoothly the game even with 30fps cap medium settings and !1080p! while iphone XS max runs it 60fps high 2688x1242 without a single frame drop. Same goes for the 11 pro max, obviously.

    As for ios - it improves massively and adds more and more missing features/drops restrictions with every version. ios 14 is already known to drop more. I prefer android, because I can do more + I love oneUI, but that doesn't change the fact that in my country I will receive exynos and 1.5 years of decent support. And in the end of the day - I spend my time in apps, not in the settings menu and apps on ios are better, with more features, smoother, a lot of them exclusive to the platform. Can you play dead cells on your android device? No? Yeah, the port is expected around the end of the year, I have it from June 2019. Full blown civilization 6 on your android device? Yeah, will never come, I have it and it's 1:1 port that runs great. Can go on and on and on. If you spend your time tweaking settings, options, UI - good for you, I spend my time in games and apps.
    Reply

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