iPhone 12 mini Lost 6% battery overnight. Is this normal?

N

NewBench

Cancelled
Couple of weeks old 12 Mini. Left it at 100% battery before I went to bed at around 11pm. Woke up at 8am and battery was 94%. I have location services and background app refresh off, screen off entire night etc.

Is this normal to lose 6% battery in that period of time?

I've looked at the battery usage/activity and there's nothing showing using the battery overnight.

Only ask as I'm fairly sure my old SE would only drop a percent or two at the most overnight.

Thanks
 
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It could be normal, or could be an issue.

You can check in settings to see if there was something in particular that was using excessive energy.

Do you have an Apple Watch? I noticed that my SE's battery started to drain a lot more after getting an AW.

Prior to the AW, I was only charging my iPhone with my CarPlay head unit during my 20 minute daily commute, never having to use my home charger at all. After the AW, I am having to charge almost daily.


NewBench said:
Left it at 100% battery
Click to expand...

Another thing, the iPhone displaying the battery percentage at 100% doesn't always equal 100% full. I have notice that if I leave my iPhones on the charger for a while after it reaches 100%, it continues to charge a little more. Meaning that the time that it takes to go from 100% to 99% is like 5 times longer than the time it takes to go from 99% to 98%.

If I would unplug the iPhone from the charge right about the time it got to 100%, then I wouldn't have that little extra charge.

I am not sure if that is impacting your experience, but maybe it could.
 
@vertical smile No Apple Watch. I think you might have a point re taking it off charge at 100% - I took it off at the point it reached that, so it wasn't necessarily fully charged. I've checked the battery usage/activity like I said and there isn't any battery activity shown during the night. It is connected to Wi-Fi overnight so perhaps just being connected drains it slightly (don't think it shows this in the battery section as it's not an app)
 
Normal in that they all do it, but unacceptable as far as I'm concerned. Apple lives in the fantasy world where it thinks everyone leaves their phone plugged in over night.
Turning on Airplane mode and toggling on Low Power mode can get the discharge down to a percent or two over night.
 
NewBench said:
Only ask as I'm fairly sure my old SE would only drop a percent or two at the most overnight.
Click to expand...
Here's the rub, the battery charge may have only dropped a percent or two because...
vertical smile said:
the iPhone displaying the battery percentage at 100% doesn't always equal 100% full.
Click to expand...

Apple's 'smart' charging works in four ways:

• (Capable of) Very fast charging up to 50%
• (Capable of) Somewhat fast charging from 50% to 90%
• Trickle charging at 90% and higher
• Cycling charge at peak
*** When the battery charge reaches 100%, the device will stop charging and allow the battery to drain to 95%. At 95%, trickle charging resumes until 100% again, then the process repeats until the device is disconnected from the external power source (i.e. charger).
*** With "Optimized Battery" charging, the peak is 80% rather than 100%
*** The user is not shown this 5% cycling, the display will simply stay at 100% -- this is why you might see the charge level jump from 100% to 97%, for example, following a short usage after disconnecting the device from the charger.

Basically, your iPhone could have been at any charge level from 95% to 100% at the start of bedtime.
 
for smaller battery phones it’s roughly 1% per hour idle and 10% per hour of use .. “roughly”
 
I almost always lose 5% every night with everything off, push, BT, celullar, everything, including airplane mode on. There were times when it was 0%. Nothing to do with 100% marker. And nothing showing in battery settings.

Just got something else very weird several times. When syncing my Garmin watch for a minute, turning BT and off again afterwards I lose around 3-4%. Very annoying esp since I just restarted the watch and it was only 1% lost and back to 23% instead of 20% before.

Battery behavior seems weird with iOS14 and iPhone 12 mini.
 
I only lose around 3-4% on my 12 and I keep background refresh/location services on so it does seem a bit high imo.
 
Of course Mini has smaller battery, it is expected to lose a bit more than the normal 12. But 5% one night with EVERYTHING off, everything, only the device itself is on. That is too much imo.
 
So now I know the 5% are ridiculous, even for a 12 Mini.

Today I had airplane mode off overnight. I got some messages (SMS) and had LTE on the whole night and I "only" lost 6%, 1% more than in airplane mode without any notifications. WTF. Now I know there is something wrong when phone is losing 5% in airplane mode overnight. I have already reported this to apple. But everyone should.

www.apple.com

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Apple wants to hear from you. Send us your comments and feedback about iPhone.
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taneff said:
I have already reported this to apple. But everyone should.
Click to expand...
I am not sure there is a problem to report.

I think you should reread these two posts:

MacCheetah3 said:
Apple's 'smart' charging works in four ways:

• (Capable of) Very fast charging up to 50%
• (Capable of) Somewhat fast charging from 50% to 90%
• Trickle charging at 90% and higher
• Cycling charge at peak
*** When the battery charge reaches 100%, the device will stop charging and allow the battery to drain to 95%. At 95%, trickle charging resumes until 100% again, then the process repeats until the device is disconnected from the external power source (i.e. charger).
*** With "Optimized Battery" charging, the peak is 80% rather than 100%
*** The user is not shown this 5% cycling, the display will simply stay at 100% -- this is why you might see the charge level jump from 100% to 97%, for example, following a short usage after disconnecting the device from the charger.
Click to expand...


And, @MacCheetah3 summed it up perfectly with this statement:
MacCheetah3 said:
Basically, your iPhone could have been at any charge level from 95% to 100% at the start of bedtime.
Click to expand...


Similarly to my earlier post, just because your iPhone 12 Mini says the charge is at 100%, doesn't mean that it is actually at 100%.

Your testing methods just won't give you an accurate result.

When your Airplane mode was on, you could have been at 96% charge capacity when you went to sleep, and the iPhone still shows 100%.

Then last night with Airplane mode off, you could have been at 100% charge capacity, meaning the iPhone used more energy with Airplane mode off and getting text messages than with Airplane mode on and doing nothing on your iPhone... Pretty much what one would expect.

A better way of measuring how much energy is being use would be to charge it to 85% then unplug and go to sleep. So it a few times with Airplane mode on and a few times with it off, then let us know what happens.
 
What does have to do with my post? I don't charge at night? I don't even have close to 100% charge during that happening most of the time? And my results are the same at any percentage. I haven't been on 100%. Totally off topic to my post sorry. I have not written one thing about 100% charge????? Have you read MY posts?

There is a problem when you lose the same battery percentage in 8-10h weather it is on airplane mode or internet on with messages coming in. There has to be a difference. Nothing is running in the background, no background refresh or push activated ever, and it still uses the same amount as the phone on LTE with notifications.
 
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