1. Girevik's Avatar
    The last several weeks my battery life has been horrible and I'm not sure what has changed. As an example, I recently bought a new charging cable for my car and that actually charged the battery while I used my GPS and Android Auto. Not the battery drains quickly. Any use in general seems to just suck the life out of the battery. I haven't had a chance to test it as I'd like, but leaving it in standby doesn't seem to be as bad (I usually charge it overnight but have been meaning to charge it before I go to bed and see where it is when I get up).

    I don't see anything that looks out of whack on the battery screen in the settings. Does anyone have any suggestions on how to track down the culprit?
    10-15-2017 09:00 PM
  2. B. Diddy's Avatar
    Charge up to 100%, then let it drain to 20-30% with normal usage, without charging in between. Then show us:

    1. The main Settings>Battery screen.
    2. The fullscreen battery graph screen (which shows Awake time and Cell Signal Strength).
    3. The Screen category (to see total Screen On time).
    4. The Cell Standby category, if present (to see Time Without Signal).


    You might have to install a 3rd party battery monitor, like GSam Battery Monitor, to get the Cell Signal Strength graph.
    10-15-2017 10:45 PM
  3. Girevik's Avatar
    Ok, I got some screen shots but my usage for today was very atypical. I was on calls way more than usual and didn't spend as much time using aps (hopefully the pictures attach properly).

    Poor Battery Life-battery1.jpg
    Poor Battery Life-battery2.jpg
    Poor Battery Life-battery3.jpg
    Poor Battery Life-battery4.jpg
    10-16-2017 09:46 PM
  4. B. Diddy's Avatar
    Can you show a cell signal strength graph? I don't think that's available in the stock settings, so you'd have to install GSam Battery Monitor. The reason I ask is that poor signal can drain your battery, and won't show up as "Time Without Signal" if the phone can at least detect a little bit of it.
    10-16-2017 10:16 PM
  5. Girevik's Avatar
    Is this what you're after? Sorry I didn't reply sooner, I didn't work at my normal location for a good bit of the day and wasn't sure it would be a good indication. That said, I work downtown and my location hasn't change so I'd be surprised if that was an issue.

    Poor Battery Life-graph.jpg
    10-18-2017 08:15 PM
  6. B. Diddy's Avatar
    Yes, that's what I was looking for, thanks!

    Your cell signal certainly isn't consistently great. The steeper slopes do seem to correspond to when the signal is weaker or in flux. You could see what happens if you use the phone for a while in Airplane Mode (if that's feasible). Or if you spend most of a phone charge in an area of consistently good signal, compare that graph with this current one.
    10-18-2017 10:14 PM
  7. Girevik's Avatar
    Since I downloaded Gsam for the above, I figured I'd see what it showed. Here is a case when I had it unplugged for about 3 hours and I had used it a fair amount for killing time; games, Facebook, ect.

    It says the biggest drain was "phone radio". What does that tell me?

    Poor Battery Life-gsam1.jpg
    Poor Battery Life-gsam2.jpg
    10-21-2017 11:28 AM
  8. B. Diddy's Avatar
    That would probably be consistent with poor cell signal as well. If you can, find an area with reliably good cell signal and stay there for a few hours while using your phone intensively. Does Phone Radio still show up as a big battery drain?
    pontiac005 likes this.
    10-21-2017 01:10 PM
  9. Girevik's Avatar
    Signal should have been great where I was. Outdoors in a heavily populated area. I wouldn't know where else to go. The first graph I was in a downtown tower so could see potential interference.
    10-21-2017 03:12 PM
  10. B. Diddy's Avatar
    The next time you see that kind of Phone Radio battery usage, also check the cell signal strength graph in GSam.
    10-22-2017 03:38 AM
  11. Girevik's Avatar
    Could wi-fi have something to do with it? I tried to reproduce what I saw Friday to check the cell graph, but since I was not connected to wi-fi on Friday I turned it off thinking it would make things more consistent. It didn't seem to drain as fast (but that's subjective) and when I checked Gsam it only had 3% used for Phone radio. I did this in my house, which is no more than a mile from where I was Friday and got the results from the last screen shot, so I doubt there was any difference in cell signal strength.
    10-22-2017 08:48 PM
  12. B. Diddy's Avatar
    Do you keep wi-fi calling on? I don't know if this is the case, but perhaps if wi-fi signal is weak and wi-fi calling is on, it's the same as if cell signal was weak on its own.
    10-23-2017 02:22 AM
  13. Girevik's Avatar
    No. I've never used Wi-Fi calling that I'm aware of. Unless it's turned on by default and I never paid attention but I don't think that's the case.
    10-23-2017 07:28 AM
  14. B. Diddy's Avatar
    Ok, check it just to make sure. And the next time Phone Radio uses that much battery, check the cell signal strength graph in GSam.
    10-23-2017 02:37 PM
  15. Girevik's Avatar
    Wi-fi calling definitely isn't enabled. I'll try turning Wi-Fi back in and see what the "phone radio" status look like.
    10-23-2017 07:45 PM
  16. Girevik's Avatar
    I've not seen those crazy "phone radio" numbers again. Gsam is now showing the largest consumer as "Application CPU", but unlike when I've used Gsam before, it's not showing the individual ap usage. Does my phone need to be rooted to see that now?
    10-25-2017 08:51 PM
  17. B. Diddy's Avatar
    Probably, although I don't know for sure. But just because something is the highest relative battery consumer doesn't mean it's inappropriately high. What's more important is your total battery life -- is it any better?
    10-26-2017 01:22 AM
  18. chanchan05's Avatar
    You don't need to root. You can bypass that need using a PC and ADB. There are instructions in the GSAM app.
    B. Diddy likes this.
    10-26-2017 01:38 AM
  19. xplod566's Avatar
    Try switching with a new sim
    10-26-2017 03:55 AM
  20. Girevik's Avatar
    It doesn't seem to be better, but t's so subjective it's hard to say. I did get a new update today, so we'll see if that makes a difference. The good news is hat it looks like the OS update opened up whatever Gsam needs to read the AP cpu usage.
    10-26-2017 08:41 PM
  21. Girevik's Avatar
    So it's been a while, but I've finally got Gsam set up to show me the app specific usage. Perry consistently the top two drains are android system and kernal. Does that tell me anything?
    11-27-2017 10:35 AM

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