iOS 18 Battery Life Thread

[lleial]

Since it’s Sunday I’ve been home all day on wifi not using much the phone. But as you can see it was last charged to 100% last night and has gone down 49% without doing much.

5th day since I wiped it and it has only gotten worse. The whole “indexing” and “background processing” nonsense is done now.

I guess these are the consequences of bad, buggy and glitchy software that seems like it’s never going to get fixed.

For those who don’t know this is the iPhone 14 Pro with battery life at 91,5% (as per Coconut battery)

Very unfortunate.

 

[Sushb]

Hi all, I have a 16 pro max and my wife has the pro. My wife has the expected battery performance so I compared my battery health stats to hers. What I have noticed is her screen idle time is very low compared to what mine is showing. I have disabled background app refresh however the screen idle time is very high. Looking through some of the posts here it seems the common thing standing out for these experiencing poor battery life is high screen idle times with low screen active times. I am so tempted to try a hard reset connected via my mac to see if it fixes.

 

[jazzzyJeff]

Since it’s Sunday I’ve been home all day on wifi not using much the phone. But as you can see it was last charged to 100% last night and has gone down 49% without doing much.

5th day since I wiped it and it has only gotten worse. The whole “indexing” and “background processing” nonsense is done now.

I guess these are the consequences of bad, buggy and glitchy software that seems like it’s never going to get fixed.

For those who don’t know this is the iPhone 14 Pro with battery life at 91,5% (as per Coconut battery)

Very unfortunate.

View attachment 2439785
View attachment 2439788

You should try calibrating the battery.

 

[kecinzer]

I set up 80% battery charge limit. But every morning I putting phone off the MagSafe charger I have 75% to 78% battery. No matter how long I sleep (6 to 9 hours). I don't understand this behavior.

 

[Morac]

I set up 80% battery charge limit. But every morning I putting phone off the MagSafe charger I have 75% to 78% battery. No matter how long I sleep (6 to 9 hours). I don't understand this behavior.

From what I can tell from trying out the charge limit setting, the phone will charge to 80% (or what you set it to) and then stop charging and begin to drain. Once it gets to about 5 below the target range (in this case 75%) it will start charging again. Note that any tasks that require being “on power” won’t happen while the battery is draining, so for example indexing photos.

This differs from optimized charging where the phone charges to 80% and holds there until it decides it’s time to fully charge. During that time the phone will do background tasks.

It seems like the charge limit method is a bug as it effectively means if you charge the phone it really only has about an hour or 2 to complete all the background tasks which isn’t enough time. This is especially true after setting up a phone as new or upgrading it. It would take forever to index photos if it could only process them about an hour a day.

 

[rob2bob]

I set up 80% battery charge limit. But every morning I putting phone off the MagSafe charger I have 75% to 78% battery. No matter how long I sleep (6 to 9 hours). I don't understand this behavior.

Mine even rises a little above 80% at times, eg 82%. I guess it is not a precise science.

 

[kecinzer]

Well that is pretty fail to me. I set charge limit to 80% and start charging every day to prevent battery discharges over night (cca. 5%), but this behavior do this. That is dum.
I think I will go back to my 2 days cycles with charging to 100%. With this approach my iP14PM battery stays on 100% health for 13 months.

 

[rob2bob]

Ditto

Well that is pretty fail to me. I set charge limit to 80% and start charging every day to prevent battery discharges over night (cca. 5%), but this behavior do this. That is dum.
I think I will go back to my 2 days cycles with charging to 100%. With this approach my iP14PM battery stays on 100% health for 13 months.

Yes battery drain overnight on my iPhone 16 runs at circa 5-6% and the battery usage shows nothing in play.

 

[Rastapopoulos]

From what I can tell from trying out the charge limit setting, the phone will charge to 80% (or what you set it to) and then stop charging and begin to drain. Once it gets to about 5 below the target range (in this case 75%) it will start charging again. Note that any takes that require being “on power” won’t happen while the battery is draining, so for example indexing photos.

This differs from optimized charging where the phone charges to 80% and holds there until it decides it’s time to fully charge. During that time the phone will do background tasks.

It seems like the charge limit method is a bug as it effectively means if you charge the phone it really only has about an hour or 2 to complete all the background tasks which isn’t enough time. This is especially true after setting up a phone as new or upgrading it. It would take forever to index photos if it could only process them about an hour a day.

Only when charging wirelessly. If you plug it in, the phone will stop at 80% and keep it at that level. No drainage. It will also keep doing background tasks all night when at 80% when plugged in.

 

[kirbysmartsdawg]

From what I can tell from trying out the charge limit setting, the phone will charge to 80% (or what you set it to) and then stop charging and begin to drain. Once it gets to about 5 below the target range (in this case 75%) it will start charging again. Note that any takes that require being “on power” won’t happen while the battery is draining, so for example indexing photos.

This differs from optimized charging where the phone charges to 80% and holds there until it decides it’s time to fully charge. During that time the phone will do background tasks.

It seems like the charge limit method is a bug as it effectively means if you charge the phone it really only has about an hour or 2 to complete all the background tasks which isn’t enough time. This is especially true after setting up a phone as new or upgrading it. It would take forever to index photos if it could only process them about an hour a day.

This is a really interesting and accurate perspective on what’s happening. I believed Apple had made a mistake with the charge limit, resulting in unnecessary battery drain.

Hopefully, they can resolve this issue. However, some complaints suggest that the battery drain is not significantly different when using optimized charging.

 

[Tech_Fan]

I have my iPhone Pro Max set to charge to 90%. When I wake up, it’s at 90%. I’ve been up for about an hour or so and using my iPhone and the battery is still at 90%. It’ll be interesting to see how much battery life I have left at bedtime.

 

[kirbysmartsdawg]

I have my iPhone Pro Max set to charge to 90%. When I wake up, it’s at 90%. I’ve been up for about an hour or so and using my iPhone and the battery is still at 90%. It’ll be interesting to see how much battery life I have left at bedtime.

I wonder if there is a bug with the charge limit for some of us. My limit is set to 95%, and sometimes it stays there for over an hour and drains better. However, most of the time, it starts to drain after only about 30 minutes.

 

[rob2bob]

Just a general question... for those of us with idle battery drain on the iPhone 16... do you have a paired Apple Watch? I am sure this is the culprit.

 

[TexasAggie013]

Just a general question... for those of us with idle battery drain on the iPhone 16... do you have a paired Apple Watch? I am sure this is the culprit.

I have a paired Apple Watch and had the same thought. Unpaired it for 12 hours but there was no change in drain.

 

[rob2bob]

I have a paired Apple Watch and had the same thought. Unpaired it for 12 hours but there was no change in drain.

thanks for trying that out

 

[bydandie]

So I’ve updated to the RC on my iPhone 16 pro, charged it up to 75% and went on a walk with the dog. Had a couple of short phone calls with the wife and still 75% 41 mins later.

That seems to be better than before, so here’s hoping it’s a sign of things to come 😎

 

[lleial]

So I’ve updated to the RC on my iPhone 16 pro, charged it up to 75% and went on a walk with the dog. Had a couple of short phone calls with the wife and still 75% 41 mins later.

That seems to be better than before, so here’s hoping it’s a sign of things to come 😎

I think I’m going to install it right now loool.

Here’s the situation right now for today:

iOS 18.0.1 - ip14 pro (91,5% battery life)

 

[Morac]

Only when charging wirelessly. If you plug it in, the phone will stop at 80% and keep it at that level. No drainage. It will also keep doing background tasks all night when at 80% when plugged in.

Interesting. I wonder why wireless charging works fine when using optimized charging, but not charging limits.

 

[mikiotty]

I’m actually surprised by iOS 18.0.1 compared to 18.0 on my 15 Pro. Still not nearly as good as 17.7, but definitely acceptable.
Mixed Wi-Fi and 4G usage.

 

[Populus]

Hey hey! I’m really eager to read the first impressions about how efficient is the -presumably- final build of iOS and iPadOS 18.1 is. Especially on A15 devices and M2 iPads. I know it is still early, but whatever you notice during this following days I’ll be really interested to read about it.

If everything goes according to the plan (and manage to find TIME to do it), I will install it, a clean restore with the IPSW, on my iPhone SE 3 and my M2 iPad Pro, to see how it works for me, on my devices.

Meanwhile, keep those first impressions flowing!

 

[TwoBytes]

No figures, but 18.1 is a big improvement on the iPhone 16!

 

[Elrancherox]

I'm still on 18.0.1 on 16PM, I don't have any battery drain issues. The battery is perfect on this phone. Two days with full charge. One day between 20-80% charge because I use charging limit set to 80%.

What I disabled:

App Background Refresh
Siri
Location Enabled(only Find my iPhone, Calibration)
I use dark icons with dark wallpaper.
All uneseccary iphone default apps removed.
Haptics disabled, sound disabled.
No widgets.

 

[Stiille]

I am debating with myself whether to install the RC of 18.1 or stay on 18.0.1 because there the battery life is good with my 15 Pro Max…
What do you guys think ?

Sometime in the future I have to update - so what’s your opinion?

 

[Maloney~888]

I am debating with myself whether to install the RC of 18.1 or stay on 18.0.1 because there the battery life is good with my 15 Pro Max…
What do you guys think ?

I’m on 18.1 RC with 15 Pro. To early to tell for sure but battery life isn’t noticeably different from 18.0.1. Installed last night straight after release (Have AI on).

 

[Elrancherox]

I am debating with myself whether to install the RC of 18.1 or stay on 18.0.1 because there the battery life is good with my 15 Pro Max…
What do you guys think ?

Sometime in the future I have to update - so what’s your opinion?

Be patient. I always install new version only one week after the officialy release date, in this way I let others test and publish how is going on and only after I install it.