1. Android Central Question's Avatar
    After I updated my Note 9 to Android 10 my battery drain quickly. I charged it to 100% before going to bed, I ran device care then out the office down and went to bed. When I got up 7.5 hours later, the battery had drained 25% and the phone feels warm.
    I've tried updating all my apps and clearing the cache but nothing seems to fix the problem. It wasn't like this before updating.
    02-12-2020 09:04 PM
  2. mustang7757's Avatar
    What's showing up high on your battery stats?

    'll leave a Link to register so you can communicate here as a guest account you can only post questions but can't reply.

    02-12-2020 09:08 PM
  3. B. Diddy's Avatar
    Welcome to Android Central! Also see if this happens in Safe Mode: https://www.t-mobile.com/support/dev...g-galaxy-note9
    02-12-2020 09:50 PM
  4. fleshtwister's Avatar
    Last night I charged it to 100% and then put it in Safe Mode as well as activated Do Not Disturb, when I checked it 9 hours later it had only gone down 3%
    02-13-2020 01:18 PM
  5. mustang7757's Avatar
    Hi , welcome!
    That's good , but should of did safe mode without DND. What did you see high on your battery stats?
    02-13-2020 01:19 PM
  6. fleshtwister's Avatar
    I always have my phone on DND when I'm sleeping. I haven't checked the battery usage but will tomorrow morning. Thanks
    mustang7757 likes this.
    02-13-2020 02:52 PM
  7. B. Diddy's Avatar
    If the problem persists after booting out of Safe Mode, then try also wiping the cache partition: https://www.t-mobile.com/support/dev...g-galaxy-note9
    02-13-2020 03:21 PM
  8. fleshtwister's Avatar
    How can I see what is using high battery usage without going through every app one by one?
    Last night it drained from 100% to 83% in 6.5 hours.
    02-14-2020 05:51 PM
  9. fleshtwister's Avatar
    When I check battery usage it just shows a graph and below that it shows apps but it says how much they were used but not since fully charged
    02-14-2020 06:01 PM
  10. B. Diddy's Avatar
    Charge it up to 100%, then use it normally until it's down to about 30%. Then look at the app usage in the battery stats.
    fleshtwister likes this.
    02-14-2020 06:52 PM
  11. fleshtwister's Avatar
    Last night I charged the phone to 100% and turned the wifi off. When I will up it only was down 4%. Why would wifi cause my battery to drain so much? I've stopped using WiFi and my battery lasts do much longer.
    03-04-2020 12:33 AM
  12. B. Diddy's Avatar
    How's your wi-fi signal? If it's weak, then just like with a weak cell signal, I think it can lead to increased power drain as the radio tries to boost the signal
    03-05-2020 12:10 AM
  13. fleshtwister's Avatar
    WiFi is very strong. I'm guessing I'm going to have to do a factory reset
    03-07-2020 03:47 PM
  14. mustang7757's Avatar
    Sometimes it doesn't hurt to do that after a new Android version
    03-07-2020 05:09 PM
  15. B. Diddy's Avatar
    It wasn't entirely clear to me -- did you already try wiping the cache partition?
    03-07-2020 07:58 PM
  16. fleshtwister's Avatar
    Yes I've cleared the cache
    03-08-2020 01:48 PM
  17. mustang7757's Avatar
    After a andriod update usually clearing cache is all that's needed but in your case should do factory reset as some things from previous versions might of been left back
    03-08-2020 02:12 PM
  18. Syndirail's Avatar
    Hey there!

    Where you able to identify/fix the issue?

    I am facing the exact same problem, did a Factory reset even, but if either Wifi or LTE is enabled, my Note suddenly drains 15-20% overnight.
    Battery manager does not show any app with usage that high. So it has to be some background activity while connected to the internet.

    Anyone got any advise?

    Edit: This also impacts my SOT, getting around 3h less with Wifi or LTE enabled which sometimes causes me to not even make it through a whole 24h on one charge with moderate use.
    12-26-2020 08:56 AM

Similar Threads

  1. notifications on lock screen barely visible after update
    By Rashnar444 in forum Samsung Galaxy S9 & S9+
    Replies: 8
    Last Post: 02-15-2020, 09:15 PM
  2. Replies: 3
    Last Post: 02-13-2020, 06:04 PM
  3. Was anyone able to reserve an Unlocked Ultra Cosmic Gray 512GB?
    By Mike Dee in forum Samsung Galaxy S20 & S20+ & S20 Ultra
    Replies: 7
    Last Post: 02-13-2020, 09:30 AM
  4. Why won't my notification bar hide in fullscreen mode?
    By Android Central Question in forum Ask a Question
    Replies: 1
    Last Post: 02-12-2020, 07:54 PM
  5. cannot streamline music tracks on a USB FD.
    By tomx2x in forum Ask a Question
    Replies: 0
    Last Post: 02-12-2020, 07:48 PM