Apurvashah_

Q: Battery drains randomly when left in standby overnight

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iPhone 6s, iOS 9.3.5

Posted on Sep 5, 2016 12:14 PM

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Q: Battery drains randomly when left in standby overnight

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  • by Lawrence Finch,Apple recommended

    Lawrence Finch Lawrence Finch Sep 5, 2016 1:29 PM in response to Apurvashah_
    Level 8 (37,854 points)
    Mac OS X
    Sep 5, 2016 1:29 PM in response to Apurvashah_

    Go to Settings/Battery and see what apps are using energy in background. You can also go to Settings/General/Background App Refresh and choose which (if any) apps you want to allow to run in background.

     

    The best answer, however, is to plug the phone in overnight, every night. In addition to eliminating any concern about energy used overnight it has other benefits:

    • Any data used overnight will use WiFi rather than cellular; WiFi is turned off when the phone is on standby to save the battery, unless the phone is plugged in.
    • If you enable automatic backup to iTunes or iCloud the phone will create a backup when the phone is asleep, connected to power and connected to WiFi.
    • Your phone will be fully charged at the start of every day.
  • by Apurvashah_,

    Apurvashah_ Apurvashah_ Sep 6, 2016 2:29 AM in response to Lawrence Finch
    Level 1 (6 points)
    iPhone
    Sep 6, 2016 2:29 AM in response to Lawrence Finch

    Everything is off, i turn my phone into battey saver then also fews % drains.

  • by Lawrence Finch,

    Lawrence Finch Lawrence Finch Sep 6, 2016 6:49 AM in response to Apurvashah_
    Level 8 (37,854 points)
    Mac OS X
    Sep 6, 2016 6:49 AM in response to Apurvashah_

    So you went to Settings/General/Background App Refresh and turned off all apps? You then went to Notifications and disabled all notifications (A notification to an app launches the application, even if Background App Refresh is off). you then went to Settings/Mail,Contacts,Calendars and disabled both Push and Fetch for all of your email accounts?

     

    Why don't you just plug in the phone overnight and save yourself all that trouble?

  • by Apurvashah_,

    Apurvashah_ Apurvashah_ Sep 6, 2016 7:30 AM in response to Lawrence Finch
    Level 1 (6 points)
    iPhone
    Sep 6, 2016 7:30 AM in response to Lawrence Finch

    If I keep my phone plug in overnight does it harm my battery ?

  • by Csound1,

    Csound1 Csound1 Sep 6, 2016 7:31 AM in response to Apurvashah_
    Level 9 (50,245 points)
    Desktops
    Sep 6, 2016 7:31 AM in response to Apurvashah_

    Not at all, you can charge for as long as you like, as often as you like.

  • by Lawrence Finch,

    Lawrence Finch Lawrence Finch Sep 6, 2016 8:38 AM in response to Apurvashah_
    Level 8 (37,854 points)
    Mac OS X
    Sep 6, 2016 8:38 AM in response to Apurvashah_

    What Csound1 said. The "charger" for the phone is actually in the phone. It isn't the thingy that plugs into the wall. That's a USB power adapter. It isn't the cable that connects that thingy to the phone. That's a lightning cable. The phone has a very smart charger built it. It stops charging completely when the phone reaches 100%. That's why you can leave it plugged in for as long as you like without hurting the battery.

  • by Apurvashah_,

    Apurvashah_ Apurvashah_ Sep 7, 2016 10:47 AM in response to Csound1
    Level 1 (6 points)
    iPhone
    Sep 7, 2016 10:47 AM in response to Csound1

    Thanks alot

  • by Apurvashah_,

    Apurvashah_ Apurvashah_ Sep 7, 2016 10:48 AM in response to Lawrence Finch
    Level 1 (6 points)
    iPhone
    Sep 7, 2016 10:48 AM in response to Lawrence Finch

    Okay

    Thanks alot

  • by ShagCA,

    ShagCA ShagCA Sep 7, 2016 11:11 AM in response to Lawrence Finch
    Level 4 (1,819 points)
    iPad
    Sep 7, 2016 11:11 AM in response to Lawrence Finch

    Lawrence Finch wrote:

     

    So you went to Settings/General/Background App Refresh and turned off all apps? You then went to Notifications and disabled all notifications (A notification to an app launches the application, even if Background App Refresh is off). you then went to Settings/Mail,Contacts,Calendars and disabled both Push and Fetch for all of your email accounts?

     

     

    Not an iPhone but I got an iPad Air that does the same thing. Battery depletes 5% to 7% overnight with nothing On except the device. Background app refresh is off, all notifications off, WiFi/Bluetooth off, Push/fetch off (I manually check mail and don't use calendar). I've even switched off location service. I'm still losing up to 7% overnight. I thought iOS 9.3.3 fixed the problem but I was wrong. I've done everything including reset. None fixes the problem so I'm throwing in the towel and just accept it as a faulty iPad. I forgot to mention that once in a while I lose some X% (less than 5%) even with the device switched off.

    Lawrence Finch wrote:

     

    Why don't you just plug in the phone overnight and save yourself all that trouble?

    That may be satisfactory solution for OP but is not a fix for me.

  • by Lawrence Finch,

    Lawrence Finch Lawrence Finch Sep 7, 2016 11:20 AM in response to ShagCA
    Level 8 (37,854 points)
    Mac OS X
    Sep 7, 2016 11:20 AM in response to ShagCA

    5 to 7% is about normal. The device is rated for 200 hours standby. So 5% of 200 hours is 10 hours.

  • by Alsking,

    Alsking Alsking Sep 7, 2016 12:17 PM in response to Apurvashah_
    Level 1 (4 points)
    iPhone
    Sep 7, 2016 12:17 PM in response to Apurvashah_

    My iphone 6 screen goes black while battery % is high...then an empty battery appears with a red line at the botton

  • by ShagCA,

    ShagCA ShagCA Sep 7, 2016 12:29 PM in response to Lawrence Finch
    Level 4 (1,819 points)
    iPad
    Sep 7, 2016 12:29 PM in response to Lawrence Finch

    I can't find battery stand-by rating. I suppose that's with activities going on in the background (over WiFi or cell network). Any details on that?

     

    never mind. Found it:

    http://www.apple.com/iphone-6s/specs/

    but I still don't know the status of background activities during stand by.

  • by Lawrence Finch,

    Lawrence Finch Lawrence Finch Sep 7, 2016 1:32 PM in response to ShagCA
    Level 8 (37,854 points)
    Mac OS X
    Sep 7, 2016 1:32 PM in response to ShagCA

    ShagCA wrote:

     

    but I still don't know the status of background activities during stand by.

    Standby time is with ZERO activities running. iOS itself is always running. Otherwise you couldn't receive calls, and you couldn't wake it up. An idle cell phone (ANY cell phone) registers with the network every few minutes so the network knows where the phone is when a call comes for you. How much energy this uses depends on signal strength; if you have a strong signal this uses about 50 mw for a second or two. If you are down to 1 bar it uses 600 mw for more seconds, but still in the seconds range. If you lose signal entirely it will use up energy really fast, as it will poll at 600 mw. Initially every few seconds; the gap between polls lengthens the longer it gets no response. It eventually gets up to every few minutes, which is why when you lose signal for a long period of time the phone may not reconnect to the network for several minutes unless you switch Airplane mode on for a few seconds, then off.

  • by ShagCA,

    ShagCA ShagCA Sep 7, 2016 2:32 PM in response to Lawrence Finch
    Level 4 (1,819 points)
    iPad
    Sep 7, 2016 2:32 PM in response to Lawrence Finch

    I understand how phone searching for cell signal works. The lower the signal the more power it uses etc. Does an iPad also search for cellular signal while cellular data is off? I don't see a reason why since it doesn't receive (or make) calls over cellular network.

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