iPhone loses about 5% overnight (around 8 hours)

RDAR

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Original poster
Oct 23, 2012
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I have an iPhone 6 Plus. The thing is, when I just finish charging my iPhone, it will not lose any battery. For example if I charge the phone full before I go to bed, unplug it and leave it overnight, the next morning it will still be 100%. So that is around the 8 hours unplugged and the charge is still the same. But once I have used the phone it will lose around 5% during that same time overnight. For example the next night, the battery will be around 55% then when I wake up it will be around 50%. Why does this happen? I have app-refresh always off, location services only on when app is opened. All e-mails to manually check. Auto-brightness on. I always clear the apps when I'm not using them. I am jailbroken but no tweaks that would have a big effect on battery. Does anyone else's iPhone act like this. I just don't understand why it loses 5% overnight when it isn't 100%.
 

Newtons Apple

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Mar 12, 2014
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You phone uses power if it is turned on. Just "barking" at the local towers to let it know it is plus other functions your phone has to do even with apps turned off.

The battery indicator is ONLY A GUIDE and at 100% it might let you use a lot of power before it drops from 100% where if at 55% it will drop accordingly. It is only a guide.

Only way to stop any battery use is to shut your phone off.
 
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bhayes444

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Jul 13, 2013
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Like Newtons Apple said: it is only a guide. Many people have noticed that it takes a good while (most times) for the battery to drop from 100% to 99%. Some people have gotten like 20 minutes of usage before that occurs. It just depends on how the system is reading the battery information. Once you unolug it, it loses power. It just so happens to take longer for the system to register 100 to 99 than 50 to 49.
 
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RDAR

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Original poster
Oct 23, 2012
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Do you guys lose 5% overnight on your iPhones though? I couldn't experience this with my 5S because I always had to charge it every night cause it would almost be dead by the end of the day lol.
 

slippery-pete

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Jun 23, 2007
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I have an iPhone 6 Plus. The thing is, when I just finish charging my iPhone, it will not lose any battery. For example if I charge the phone full before I go to bed, unplug it and leave it overnight, the next morning it will still be 100%. So that is around the 8 hours unplugged and the charge is still the same. But once I have used the phone it will lose around 5% during that same time overnight. For example the next night, the battery will be around 55% then when I wake up it will be around 50%. Why does this happen? I have app-refresh always off, location services only on when app is opened. All e-mails to manually check. Auto-brightness on. I always clear the apps when I'm not using them. I am jailbroken but no tweaks that would have a big effect on battery. Does anyone else's iPhone act like this. I just don't understand why it loses 5% overnight when it isn't 100%.
Something doesn't sound right. I would contact the FDA and have them open a case
 
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CellXor10

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Apr 23, 2015
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Do you guys lose 5% overnight on your iPhones though? I couldn't experience this with my 5S because I always had to charge it every night cause it would almost be dead by the end of the day lol.

Yeah, like everyone said the way it reads battery info is what's going on- my iPhone 6 takes a good amount of usage to drop from 100% to 99%, but then the drop from 99% to 98% happens very quickly. I don't have service at my house so I can lose quite a bit more than 5% overnight. Or I should say very shaky service- there are spots were a bar or two can be found, so depending on if my phone finds service or not, I have highly variable battery drainage if I don't leave it plugged in charging over night. Like you, I have had times where I am at 100% and wake up with 100% still showing, but other times I can literally drain I wanna say over 10%.

I realize this doesn't answer your question exactly since it is a different scenario, but that's what I've got going on.
 

Pelea

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Oct 5, 2014
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Iphones are designed to give the impression that they last longer than they actually do. That's why 100-99% mysteriously lasts 20x longer than 55-54%. It doesn't show your battery drain until your battery hits around 94%. Since you're jailbroken u can actually prove this by downloading "battery life" which shows your REAL battery percentage.
 
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SSD-GUY

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Sep 20, 2012
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That's perfectly normal. Your device is still on and doing things in the background, most notably syncing with cell towers, local wifi, other push services etc etc.
 
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CellXor10

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Apr 23, 2015
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That's perfectly normal. Your device is still on and doing things in the background, most notably syncing with cell towers, local wifi, checking email, other push services etc etc.
Well, he did say he doesn't have email push to his phone, but yes, even with background activity shut off for all your apps, there are still plenty of things that are constantly running in the background - like syncing/searching for cell towers/service and WiFi.
 
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SSD-GUY

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Well, he did say he doesn't have email push to his phone, but yes, even with background activity shut off for all your apps, there are still plenty of things that are constantly running in the background - like syncing/searching for cell towers/service and WiFi.
True, I will omit that.
 
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C DM

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Oct 17, 2011
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Iphones are designed to give the impression that they last longer than they actually do. That's why 100-99% mysteriously lasts 20x longer than 55-54%. It doesn't show your battery drain until your battery hits around 94%. Since you're jailbroken u can actually prove this by downloading "battery life" which shows your REAL battery percentage.
I think it has more to do with how battery meter approximations go (using voltage and all that) than some sort of a particular design or anything like that.
 

eyoungren

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Aug 31, 2011
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Do you guys lose 5% overnight on your iPhones though? I couldn't experience this with my 5S because I always had to charge it every night cause it would almost be dead by the end of the day lol.
I don't lose anything overnight. Even with the screen on all night.

But that's because I use my phone as a nightstand clock at night and it's plugged in from the time I go to bed to the time I get up.
 
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