1. wps81's Avatar
    I put my 1520 to flight mode when sleep. It was 97%. When I wake up, power drops to 77%. Whopping 20% lost!

    Does anyone experience this? Do I need to also enable battery saving mode?
    Last edited by wps81; 03-06-2014 at 05:09 AM.
    03-06-2014 04:58 AM
  2. Microsoftjunkie's Avatar
    Did you still use Glance?
    03-06-2014 05:08 AM
  3. wps81's Avatar
    Did you still use Glance?
    Yes, I use glance but setting is Peek so it is off when I am in sleep.
    03-06-2014 05:09 AM
  4. sotoy_yuk's Avatar
    It happen to my and my friend's 920. It seems that an app still processing something and eating something. For me it was the lock screen tile from system tiles
    03-06-2014 05:11 AM
  5. wps81's Avatar
    Here I find a review stating similar power consumption in flight mode Nokia Lumia 1520 review: Battery life and connectivity | Phone Reviews | TechRadar

    Also alarming was the fact that the phone chewed 17% of its battery capacity when left on flight mode overnight.
    03-06-2014 05:12 AM
  6. wps81's Avatar
    It happen to my and my friend's 920. It seems that an app still processing something and eating something. For me it was the lock screen tile from system tiles
    My 820 is fine. It only drops 3% in flight mode. Almost same apps and settings as 1520.
    03-06-2014 05:13 AM
  7. hipporama's Avatar
    Something is definitely not right. My 1520 goes down about 7-8% overnight with WiFi always on.

    Sounds like some app is stuck in the background. Try and soft reset and check overnight again.
    03-06-2014 05:14 AM
  8. Bahamen's Avatar
    My 1020 drops 1% per hour on flight mode or 2G. All background tasks switched off except Battery app.
    03-06-2014 05:18 AM
  9. wps81's Avatar
    Something is definitely not right. My 1520 goes down about 7-8% overnight with WiFi always on.

    Sounds like some app is stuck in the background. Try and soft reset and check overnight again.
    Yes, I will first try reset, and if not working I will try flight mode + battery save mode.
    03-06-2014 05:23 AM
  10. alllies's Avatar
    How many days are you asleep?lol..maybe rogue app who is causing this..
    03-06-2014 05:24 AM
  11. oditius's Avatar
    Mine charges when I sleep, I just put it on the powermat and hit the sack. I love the battery in this thing, and could probably go a couple days without having to charge it, but why? In most peoples lives we are never further away from a power source for more that a couple hours anyway. I like to start the day with a freshly charged battery, so I can try my best to get this thing under 60% before bedtime. LoL But I agree with the others, there is an app that is running in the background. Need to find which one and shut it down.
    03-06-2014 05:52 AM
  12. wps81's Avatar
    Mine charges when I sleep, I just put it on the powermat and hit the sack. I love the battery in this thing, and could probably go a couple days without having to charge it, but why? In most peoples lives we are never further away from a power source for more that a couple hours anyway. I like to start the day with a freshly charged battery, so I can try my best to get this thing under 60% before bedtime. LoL But I agree with the others, there is an app that is running in the background. Need to find which one and shut it down.
    It is diffcult to find cos there is no battery usage audit like in Android.
    03-06-2014 06:04 AM
  13. Pete's Avatar
    Go to settings->background tasks (on the applications page).

    Block any application that you don't want working in the background. Typically, if you have a live tile on your start screen or lock screen, enable the background tasks, otherwise block it and let it get data when you open the app.
    03-06-2014 06:09 AM
  14. wps81's Avatar
    Go to settings->background tasks (on the applications page).

    Block any application that you don't want working in the background. Typically, if you have a live tile on your start screen or lock screen, enable the background tasks, otherwise block it and let it get data when you open the app.
    I often do this. I don't think it is to do with any background task cos my 820 has same set of settings and apps and only consumes about 3% overnight. It seems a tough battle to find out reason.
    03-06-2014 06:16 AM
  15. cariocap's Avatar
    I often do this. I don't think it is to do with any background task cos my 820 has same set of settings and apps and only consumes about 3% overnight. It seems a tough battle to find out reason.
    do you turn on airplane mode every night ?
    03-06-2014 02:08 PM
  16. alllies's Avatar
    I often do this. I don't think it is to do with any background task cos my 820 has same set of settings and apps and only consumes about 3% overnight. It seems a tough battle to find out reason.
    how many apps have you already installed? Uninstall all Nokia apps first then try to reinstall your other apps (one at a time) and observe battery behavior. There are other battery threads here that will give you the idea what are the rogue apps..whatsapp as an example?
    03-06-2014 07:34 PM
  17. wps81's Avatar
    how many apps have you already installed? Uninstall all Nokia apps first then try to reinstall your other apps (one at a time) and observe battery behavior. There are other battery threads here that will give you the idea what are the rogue apps..whatsapp as an example?
    OK. I will try your approach. I just reset my phone this morning, and tested flight mode for 30 min. Battery still drops 2%. I will update
    03-07-2014 05:27 AM
  18. wps81's Avatar
    I read another thread, in which someone suggests bad guy is Battery app. So I removed the app.
    I have done a quick test of enabling flight mode for 1 hour. The result is good. No battery level change. I will do a full overnight test tonight and report, and may do a comparison test with Battery app installed again later.
    03-07-2014 08:14 AM
  19. cariocap's Avatar
    I put my 1520 to flight mode when sleep. It was 97%. When I wake up, power drops to 77%. Whopping 20% lost!

    Does anyone experience this? Do I need to also enable battery saving mode?
    maybe powering off the phone is better ?

    Sorry, but I cant understand why using flight mode when sleeping.

    Dont use flight mode and use the silent mode
    03-07-2014 08:58 AM
  20. wps81's Avatar
    maybe powering off the phone is better ?

    Sorry, but I cant understand why using flight mode when sleeping.

    Dont use flight mode and use the silent mode
    Hi, your comment is off topic. But, powering off will surpress Alarm. Silent mode is just about sound (am I right?). Flight mode is most appropriate for me cos it sames power and allows Alarm.
    03-07-2014 09:17 AM
  21. cariocap's Avatar
    Yes, silent is no sound but the alarm sound still work.
    Some background applications need access to the internet and when these applications can't find internet they will keep trying to access the internet forever using more juice from your battery.
    If you don't like off topic comments don't come to a forum.
    03-07-2014 09:30 AM
  22. wps81's Avatar
    Yes, silent is no sound but the alarm sound still work.
    Some background applications need access to the internet and when these applications can't find internet they will keep trying to access the internet forever using more juice from your battery.
    If you don't like off topic comments don't come to a forum.
    I don't hate off-topic comment, so I still reply you. I will use flight mode and battery saver mode then. The main topic is finding root cause of battery drain. At the moment conclusion is that Battery app is the killer.
    03-07-2014 09:52 AM
  23. wps81's Avatar
    I read another thread, in which someone suggests bad guy is Battery app. So I removed the app.
    I have done a quick test of enabling flight mode for 1 hour. The result is good. No battery level change. I will do a full overnight test tonight and report, and may do a comparison test with Battery app installed again later.
    A full overnight test is good. In flight mode, no battery drain at all now after uninstalled Battery app.
    03-08-2014 06:46 PM

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