02-10-2021 05:49 AM
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  1. SnoFire's Avatar
    Coming from the S10 to the regular S21 I am noticing a huge difference in battery life. On the S10 it estimated almost 18hrs of battery life where the S21 is estimating only 10hrs. I notice the difference too. Just from light browsing I can see the battery percentage go down by 1% every other minute or so. Even after 2 years with the S10 my battery would last until 5 or 6pm.

    Shouldn't I be getting better battery life with this display? I checked all settings and everything is set up the same as my old phone.

    Another thing is the S21 doesn't charge nearly as fast as the S10 does.
    The battery is bigger on the S21 so it is going to take longer. Browsing the web you should not see that 1% drop every minute. You got something setup bad on your phone if that is the case. I'd go through it and check all settings.
    02-02-2021 09:01 AM
  2. SnoFire's Avatar
    I went from the S10 to S21+. The battery life on my S10 was pretty good even after 2 years. I'm getting about 2 days of battery life on my phone averaging about 4hrs screen time. I'm happy with the upgrade and the battery life.
    Rose4uKY likes this.
    02-02-2021 09:03 AM
  3. Muessig's Avatar
    The battery is bigger on the S21 so it is going to take longer. Browsing the web you should not see that 1% drop every minute. You got something setup bad on your phone if that is the case. I'd go through it and check all settings.
    I noticed a huge difference in just not using the Chrome browser. I had it active for 13 minutes and 16% of the battery was used up - I switched to another browser and in 15 minutes use only 1% of the battery had been used. Quite a difference.
    02-02-2021 09:18 AM
  4. jlangner's Avatar
    With 120hz on, S21 Ultra, I am getting the same or battery life than Note 20 ultra with 120hz off.
    pags11 likes this.
    02-02-2021 10:12 AM
  5. chimpboy74's Avatar
    It's still early days for me but days 1 and 2 I was a bit Concerned that battery life wasn't as good as I hoped. Today seems much better.

    How much is due to me not fiddling with it as much is hard to say!!!
    02-02-2021 11:18 AM
  6. Gary02468's Avatar
    With 120hz on, S21 Ultra, I am getting the same or battery life than Note 20 ultra with 120hz off.
    Yup, same here, SM-G998U1 using 120Hz, WQHD, 5G, AoD, location tracking, etc. After six days now, GSam says I'm averaging 22+ hours per charge, with 6+ hours of screen time. For me, that's the best battery life of any phone yet.
    Rose4uKY likes this.
    02-02-2021 11:46 AM
  7. mustang7757's Avatar
    Yup, same here, SM-G998U1 using 120Hz, WQHD, 5G, AoD, location tracking, etc. After six days now, GSam says I'm averaging 22+ hours per charge, with 6+ hours of screen time. For me, that's the best battery life of any phone yet.
    Thats very good with everything ticked on
    Rose4uKY likes this.
    02-02-2021 01:19 PM
  8. soundchasr's Avatar
    S21 on the left. S20 on the right. S20 is much better. Considering returning S21......

    Battery Life-20210202_171630.jpg


    Edit: don't know left from right. :-)
    02-02-2021 05:22 PM
  9. ironass's Avatar
    S21 on the right. S20 on the left. S20 is much better. Considering returning it......

    Click image for larger version. 

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    If, as you say, "S21 on the right. S20 on the left ". Is not the S21 on the right the better device for battery life, at 2d 1h on a full charge?
    02-02-2021 05:34 PM
  10. soundchasr's Avatar
    If, as you say, "S21 on the right. S20 on the left ". Is not the S21 on the right the better device for battery life, at 2d 1h on a full charge?
    My bad. Fixed. S20 is the better.
    ironass likes this.
    02-02-2021 06:20 PM
  11. kjjb0204's Avatar
    Yup, same here, SM-G998U1 using 120Hz, WQHD, 5G, AoD, location tracking, etc. After six days now, GSam says I'm averaging 22+ hours per charge, with 6+ hours of screen time. For me, that's the best battery life of any phone yet.
    I've never seen 6 hours SOT from a phone. After mine settles in I'll start keeping an eye on it for comparison sake.
    02-02-2021 06:37 PM
  12. mundo472's Avatar
    Also coming from the s10 to the s21 ultra and the tremendous difference is in favor of the ultra. Is certainly due in part to the s10 being 2yrs old but I don't recall getting through so much of my day with so much of the battery left
    pags11 likes this.
    02-02-2021 08:17 PM
  13. rcab's Avatar
    I have a S21 and am happy with my battery . I think each person's usage impacts the results that they get.Battery Life-screenshot_20210202-194200_device-20care.jpg
    02-02-2021 08:48 PM
  14. Gary02468's Avatar
    I've never seen 6 hours SOT from a phone. After mine settles in I'll start keeping an eye on it for comparison sake.
    That's GSam's extrapolation given how much charge is left when I put the phone on its charger for the night. Maximum actual screen time during a day has been a little over 5 hours.
    02-02-2021 09:01 PM
  15. Morty2264's Avatar
    I've been using my S21 for 6 days now and the battery life estimate is now 21 hrs 45 mins on a full charge.
    Uh, WOW! That's huge!
    02-02-2021 10:23 PM
  16. ThrottleJohnny's Avatar
    And that's why posting some stupid battery test video, and then declaring the s21 battery to not be worth the upgrade was trash. Give me REAL user data!
    02-02-2021 10:34 PM
  17. jlangner's Avatar
    Yeah, but you are comparing a S20 that has had multiple updates to tweak battery and S21 with none. When I got Note 20 Ultra I couldn't make thru day with out charging at work..after 2 or 3 updates i had over 50% end of work without charging...Also, with out showing the usage / screen time on both doesn't say much...S20 could have been just sitting in standby since you were using S21
    soundchasr likes this.
    02-02-2021 10:49 PM
  18. soundchasr's Avatar
    From Samsung rep:

    Battery Life-2021-02-03_192755.jpg
    02-03-2021 07:29 PM
  19. pags11's Avatar
    From Samsung rep:

    Click image for larger version. 

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    A software update to help with battery would be good!
    02-03-2021 08:55 PM
  20. The_Woo's Avatar
    Gotta give the phone a few days to learn your patterns for the battery. First 3 days with the S21 was not good. 4.5-5 hrs SOT. After that I've been averaging a solid 7+hrs SOT with 15% just left, and with heavy use.
    soundchasr, pags11 and Gayle Lynn like this.
    02-04-2021 01:06 AM
  21. chimpboy74's Avatar
    It's still early days for me but days 1 and 2 I was a bit Concerned that battery life wasn't as good as I hoped. Today seems much better.

    How much is due to me not fiddling with it as much is hard to say!!!
    After a few more days mine has settled down. Its currently saying a full charge will last just over 23h and I've been going to bed with just under 50% charge. For the first time in years I'm considering not charging my phone when I go to bed.
    soundchasr, The_Woo and pags11 like this.
    02-04-2021 05:40 AM
  22. starsofthelid's Avatar
    I upgraded from the S10 to the S21 and the battery life was a disappointment initially. However, after a week or so in, it seems to be much better. I did a couple cycles of using the phone until 0%, then charging it to 100%. It helps to break the battery in a bit.
    soundchasr and Morty2264 like this.
    02-04-2021 01:47 PM
  23. ironass's Avatar
    When I heard before release, that Samsung had clocked the global model's Exynos 2100 higher than the Snapdragon 888 devices, I was prepared to take a bit of a hit on battery life.

    However, a week in to receiving the global Samsung Galaxy S21 Ultra I am impressed by 2 things...

    #1 The battery life and SoT has greatly improved and matches my Galaxy S20 Ultra Exynos 990.
    #2 How cool the Exynos 2100 runs, even when charging, (31C/88F), or doing benchmark tests.

    Charging on the Samsung 25W charger and USB-C-to-C cable is 0% -100% in about an hour. Not far off the S20 Ultra on a 40W charger.

    Battery life at 30 hours with 8h 34m SoT + juice left



    One thing I noticed was that Sammy need to work on their Always on Display on this phone as it was using around 19% of battery until I took it off, "Show always", and selected, "Tap to show for 10 seconds".
    soundchasr and pags11 like this.
    02-04-2021 03:20 PM
  24. Morty2264's Avatar
    I upgraded from the S10 to the S21 and the battery life was a disappointment initially. However, after a week or so in, it seems to be much better. I did a couple cycles of using the phone until 0%, then charging it to 100%. It helps to break the battery in a bit.
    So glad that the battery life has improved for you!
    02-04-2021 08:27 PM
  25. chimpboy74's Avatar
    Not very scientific (I forgot to note SoT) but I took my ultra off charge at around 8am yesterday morning. Went to bed last night with 48% charge. I got to 215pm today when, at 4% remaining, I plugged it into 25w charger. 1h20 mins later. Back to 100% charge again!!!

    To be fair it wasn't a heavy usage day but so far, I'm happy.
    Rose4uKY likes this.
    02-05-2021 12:13 PM
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