04-21-2016 03:05 AM
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  1. yongdeng zhang's Avatar
    Hello all, maybe you have seen several threads about this problem "Android System drains the battery". I still post here just because all I learnt from other threads didn't fix my problem. It is the same problem but seems to be caused by different reasons.

    I just got my Note 5 (N920I factory unlocked without any contract and using H2O wireless services and running Android 5.1.1) last Thursday and I went to bed with 73% battery, while got up the second day with 50%. This is absolutely unnormal. I noticed most of the battery was consumed by Android System/OS which doesn't make any sense to me. I immediately searched on Google and found this problem exist in different phone models and different versions of Android. I tried everything to fix it but failed.

    Here is what I have tried:
    1) reboot the system and wipe the cache partition several times;
    2) turn off WiFi, turn off NFC, turn off Bluetooth, turn on airplane mode and power saving mode;
    3) turn off Android Device Manager, turn off location service, disable Google Location History;
    4) disable Google Play Services, reboot, enable the services and updated to the latest version, update all the apps in Google Play;
    5) Finally, factory reset the system;
    Unfortunately, none of above solved my problem.

    Here I attach some screen shots so that you know what I am talking about. I had a whole day meeting and barely used the phone. You can see 88% of the battery is consumed by apps and over 70% is used by Android System/OS. Look at the CPU Usage, you see Android System is running for over 8 hours. It seems something is keeping the Android System awake for the whole time but I just don't know which one. I tried to disable all the apps belong to Android System but failed. Always some apps that you are not allowed to be disables.

    Do you have any ideas that I can still try?

    Android System battery drain on my Note 5 when on stand by (Not fixed so far), how can I stop this?-screenshot_2015-11-09-22-56-32.jpgAndroid System battery drain on my Note 5 when on stand by (Not fixed so far), how can I stop this?-screenshot_2015-11-09-22-55-54.jpgAndroid System battery drain on my Note 5 when on stand by (Not fixed so far), how can I stop this?-screenshot_2015-11-09-22-56-03.jpgAndroid System battery drain on my Note 5 when on stand by (Not fixed so far), how can I stop this?-screenshot_2015-11-09-22-56-16.jpg
    11-09-2015 10:29 PM
  2. Kelly Kearns's Avatar
    If is most likely your phone signal causing it, it is also non-existent.
    11-10-2015 12:44 PM
  3. yongdeng zhang's Avatar
    Why do you think it is caused by phone sianal? I tried airplane mode but that didn't work.
    11-10-2015 02:00 PM
  4. Kelly Kearns's Avatar
    Well because you have a very low signal and a low signal will drain your battery. Your phone radio was on for 15 hours.
    11-10-2015 02:14 PM
  5. Glock23-G4's Avatar
    Why do you think it is caused by phone sianal? I tried airplane mode but that didn't work.
    Based on your screenshots, you have a very poor cell signal.
    Kelly Kearns likes this.
    11-10-2015 02:16 PM
  6. yongdeng zhang's Avatar
    Yes. But I tried airplane mode and the battery consumption is the same. You can see the list about what I have tried.
    11-10-2015 03:07 PM
  7. yongdeng zhang's Avatar
    Also, the signal is bad only in my apartment while during the day the signal is pretty good.
    11-10-2015 03:08 PM
  8. Kelly Kearns's Avatar
    Going by this.. Your phone radio was on the entire time though.
    Attached Thumbnails Android System battery drain on my Note 5 when on stand by (Not fixed so far), how can I stop this?-1447192407559.jpg  
    11-10-2015 03:53 PM
  9. Kelly Kearns's Avatar
    With Android System and Android OS it is hard to diagnose that. Those are just "buckets" that a lot is dumped into.

    It would be interesting to see these graphs when you have a good signal. A bad signal will drain your phone similar to this. To have airplane mode on and then turn back on WiFi when at home, that will give a better idea where your signal is bad.
    11-10-2015 03:56 PM
  10. yongdeng zhang's Avatar
    I will do that and show you the graphs. Every night I will turn on airplane mode but the battery still drains quickly.
    11-10-2015 06:16 PM
  11. foxisbubba#AC's Avatar
    My usage is almost identical (same top 3) and I have a great signal at work and home..??
    11-10-2015 06:38 PM
  12. yongdeng zhang's Avatar
    That is exactly my problem. Is it anyway to know which one within "Android System/OS" is using the battery?
    11-10-2015 06:45 PM
  13. yongdeng zhang's Avatar
    I apologize for the graphs. They are kind of misleading. I think my exact problem is: turn off WiFi, turn on airplane mode, even turn on power saving mode, the battery drops over 23% within 7 hours. The same situation, my previous phone, LG G pro2, drops less than 5%.
    11-10-2015 06:48 PM
  14. Kelly Kearns's Avatar
    Have you tried to run it in safe mode to see if it drops that much?

    It is almost impossible these days to figure out when it is in Android System or Android OS without root.

    Now you can install Wake Lock Detector from the Play Store and it has instructions to install things on your computer and hook your phone up to the computer and you can tell more that way, without root.
    11-10-2015 07:46 PM
  15. yongdeng zhang's Avatar
    Here are the new graphs which show my real problem. Airplane mode, no WiFi, battery drops by 29% in less than 8 hours.

    Android System battery drain on my Note 5 when on stand by (Not fixed so far), how can I stop this?-screenshot_2015-11-11-07-01-32.jpgAndroid System battery drain on my Note 5 when on stand by (Not fixed so far), how can I stop this?-screenshot_2015-11-11-07-02-31.jpgAndroid System battery drain on my Note 5 when on stand by (Not fixed so far), how can I stop this?-screenshot_2015-11-11-07-02-40.jpgAndroid System battery drain on my Note 5 when on stand by (Not fixed so far), how can I stop this?-screenshot_2015-11-11-07-09-39.jpg
    11-11-2015 07:25 AM
  16. yongdeng zhang's Avatar
    I installed PC version of Wake Lock Detector and here are the graphs. What are 'sec-battery-monitor', 'battery', 'NETLINK', 'eventpoll'? Why do they wake up thousands of times?

    Android System battery drain on my Note 5 when on stand by (Not fixed so far), how can I stop this?-1.jpgAndroid System battery drain on my Note 5 when on stand by (Not fixed so far), how can I stop this?-2.jpgAndroid System battery drain on my Note 5 when on stand by (Not fixed so far), how can I stop this?-3.jpgAndroid System battery drain on my Note 5 when on stand by (Not fixed so far), how can I stop this?-4.jpg
    11-11-2015 07:29 AM
  17. Kelly Kearns's Avatar
    Ok, I'm going to get someone to come look that knows a bit more about WLD stats.
    11-11-2015 09:00 AM
  18. yongdeng zhang's Avatar
    Thanks. I double checked. The problem seems to be related to these: sec-battery-monitor, PowerManagerService.WakeLocks, NETLINK, eventpoll.
    11-11-2015 09:05 AM
  19. LeoRex's Avatar
    If you get this drain in Airplane Mode even after a factory reset.... I would reflash the factory image (there are plenty of instructions out there, and you can even go to Best Buy's Samsung mini store to have it done).

    If THAT doesn't work, then it is most likely a hardware problem that won't fix itself and you will need a replacement.
    11-11-2015 09:20 AM
  20. Kelly Kearns's Avatar
    Ok, chatting with some people about this.

    You have done a factory reset and still get this when in airplane, that isn't a good sign. Now remember, with your signal, if everything is perfect, when not in airplane mode, you could see this.

    Your phone is new, I would want an exchange for a new phone. What country are you located in? Various countries have different time frames and rules about exchanges.

    If there is a Samsung center near you, you could take it to them. It could be a simple hardware, software or battery fix that they can do. If they aren't close, then you can work with sending the phone to Samsung or a warranty exchange through them if there are issues with exchanging it through the person you bought it from.
    11-11-2015 09:26 AM
  21. yongdeng zhang's Avatar
    I ordered the phone from ebay, can I still go to the Best Buy for help?
    11-11-2015 09:27 AM
  22. yongdeng zhang's Avatar
    I am in US. I ordered the phone from ebay. In fact, the seller directly told me this is a known problem without solution so far.
    11-11-2015 09:29 AM
  23. Kelly Kearns's Avatar
    Well in the US you are going to be limited with help from Samsung USA on an international phone.

    I'm not sure about Best Buy.. It might depend on who you get at Best Buy and they are likely to have to download the software of they will do it.

    There are others with this version in the US that aren't having the drain like that. Also people outside the US with that version and not having those issues.

    You can also download Samsung firmware from sammobile.com. The free download is slow, but you can download it and flash yourself. Best Buy would be the easier option of they will do it.

    Personally, I only buy US variants because of the options available if there is a problem.

    It won't hurt to go to Best Buy and ask if they can reflash it.
    11-11-2015 09:40 AM
  24. yongdeng zhang's Avatar
    Thanks Kelly, I will try to flash the firmware. I saw someone mention his problem solved by reflashing the system.
    11-11-2015 02:26 PM
  25. Kelly Kearns's Avatar
    Thanks Kelly, I will try to flash the firmware. I saw someone mention his problem solved by reflashing the system.
    Sometimes that can help.

    BUT.. If it is a corrupted on your system from maybe an update, the OS has to be removed and installed fresh and only Samsung can do that, they can't do that at Best Buy.
    11-11-2015 03:41 PM
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