1. Jesus Delgadillo's Avatar
    I've noticed on my S20U Verizon that when I reach 5% of battery left, it drains to zero within 3 minutes. Usually every 1% lasts me 5 minutes, but once it hits 5% it dies to quick. Anyone else has noticed this or knows what could cause it? Or how to detect the issue?
    12-02-2020 02:59 AM
  2. L0n3N1nja's Avatar
    You do realize you shorten the life of your battery letting it drop that low right?
    frederickdawg likes this.
    12-02-2020 03:03 AM
  3. Jesus Delgadillo's Avatar
    Yep but I can't charge it while at work
    You do realize you shorten the life of your battery letting it drop that low right?
    12-02-2020 03:27 AM
  4. J Dubbs's Avatar
    Yep but I can't charge it while at work
    That's the absolute worst thing you can do to your battery..... you will kill it super fast Can you carry a small battery pack with you? Or maybe turn the phone off occasionally? At least run the extreme battery saver mode.
    12-02-2020 07:19 AM
  5. Mooncatt's Avatar
    To answer your original question, this is just the nature of Li-ion batteries and how their state of charge is calculated. The voltage curve is mostly flat until you get to the low end of charge level, then it drops like a rock. Once the charge level gets that low, the current draw increases as voltage decreases. Battery draining fast after it hits 5% of juice left-li-ion-20discharge-20voltage-20curve-20typical.jpeg
    B. Diddy and Jesus Delgadillo like this.
    12-02-2020 08:52 AM
  6. mustang7757's Avatar
    I've noticed on my S20U Verizon that when I reach 5% of battery left, it drains to zero within 3 minutes. Usually every 1% lasts me 5 minutes, but once it hits 5% it dies to quick. Anyone else has noticed this or knows what could cause it? Or how to detect the issue?
    Samsung was supposed to address this in a update .
    12-02-2020 10:13 AM
  7. B. Diddy's Avatar
    I would agree that carrying a power bank would be a good idea. Look for one that can charge wirelessly, so that you can simply hold it behind the phone off and on throughout the day.
    Jesus Delgadillo and J Dubbs like this.
    12-02-2020 12:56 PM
  8. Jesus Delgadillo's Avatar
    Thank you this is what I was looking for, if it was normal behavior as it reaches low level of battery life.
    To answer your original question, this is just the nature of Li-ion batteries and how their state of charge is calculated. The voltage curve is mostly flat until you get to the low end of charge level, then it drops like a rock. Once the charge level gets that low, the current draw increases as voltage decreases. Click image for larger version. 

Name:	Li-ion%20Discharge%20Voltage%20Curve%20Typical.jpeg 
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    12-02-2020 09:22 PM
  9. Jesus Delgadillo's Avatar
    Unfortunately it hasn't been addressed and I'm in the November update. Let's see if anything changes with the next update which im almost certain will be 3.0/Android 11.
    Samsung was supposed to address this in a update .
    12-02-2020 09:23 PM
  10. Jesus Delgadillo's Avatar
    Yeah I'm gonna look into them cause I'm working long hours and can't charge it as I'm all over the place while working
    I would agree that carrying a power bank would be a good idea. Look for one that can charge wirelessly, so that you can simply hold it behind the phone off and on throughout the day.
    12-02-2020 09:24 PM
  11. Mike Dee's Avatar
    Samsung was supposed to address this in a update .
    The last 5% or just battery life in general?

    Battery percentages aren't real....it just an estimate based on a silly algorithm.
    12-02-2020 09:34 PM
  12. Mike Dee's Avatar
    Yeah I'm gonna look into them cause I'm working long hours and can't charge it as I'm all over the place while working
    Either a battery pack or slap a zerolemon case on it if you don't mind the bulk.
    Ranjen617 likes this.
    12-02-2020 09:35 PM
  13. mustang7757's Avatar
    The last 5% or just battery life in general?

    Battery percentages aren't real....it just an estimate based on a silly algorithm.
    Last 5%
    12-02-2020 09:36 PM
  14. Jesus Delgadillo's Avatar
    Last 5%. 6 and up is amazing, lasts about 5-6 minutes per 1 percent
    The last 5% or just battery life in general?

    Battery percentages aren't real....it just an estimate based on a silly algorithm.
    12-02-2020 09:38 PM
  15. Mike Dee's Avatar
    Last 5%
    I don't let it get that far but in the past at 5 percent phones in general haven't been great
    12-02-2020 09:48 PM
  16. mustang7757's Avatar
    I don't let it get that far but in the past at 5 percent phones in general haven't been great
    I do sometimes, and it drains very quickly, I don't remember this a issue before , 5% I believe could squeeze 30 more minutes
    12-02-2020 09:50 PM
  17. Mike Dee's Avatar
    I do sometimes, and it drains very quickly, I don't remember this a issue before , 5% I believe could squeeze 30 more minutes
    You could squeeze blood out of a rock
    12-02-2020 10:03 PM
  18. mustang7757's Avatar
    You could squeeze blood out of a rock
    I've seen with a rock
    12-02-2020 10:04 PM
  19. Gayle Lynn's Avatar
    Does the performance profile automatically change? Getting below 20% would be a good choice. Gsam battery might help see what happens.
    12-03-2020 03:40 PM
  20. mustang7757's Avatar
    Does the performance profile automatically change? Getting below 20% would be a good choice. Gsam battery might help see what happens.
    I can't confirm and didn't pay attention in Android 10, I'm on the beta now and those setting are different, I would like to say it stays whatever power saving mode your current in .
    12-03-2020 04:07 PM
  21. Ranjen617's Avatar
    Maybe a battery calibration is needed here. Just like an automobile, I don't trust percentages on batteries like a gas needle.
    I would think that a recalibration would help this issue. Just from previous experience with other phones. Try it and see. Can't hurt...
    12-03-2020 04:53 PM
  22. wenso smith's Avatar
    The screen brightness is set too high A major source of battery drain is setting the screen brightness too high Another way to reduce the amount of battery power consumed by your screen is to shorten the amount of time that it'll take for the display to turn off after you stop using it.
    12-10-2020 10:41 AM

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