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iOS 18 Battery Life Thread

ATmahe said:
Uh no.
The only logical step is that Apple fixes it.
Click to expand...
you’ll probably be holding out for a long time. If a fresh install doesn’t have battery issues then Apple most likely consider it a non issue. Not saying I disagree with you that they should fix it, I’m just saying they probably won’t…

I’m not having any battery issues on 18.2. So there’s nothing intrinsically wrong with 18.2 itself, just your “config” or there’s something going on which is specific to your device
 
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guzman7 said:
That is exactly what happens to me. It gets half way through and then I get an error and the phone goes into DFU mode.
It happened when I went from iOS 18 to 18.01 and then again when I went from 18.1 to 18.11. I tried iTunes from the Windows store in addition to Apple Devices. Someone in another thread said it might be a Windows 24H2 thing.
I know that I don't have an issue updating my iPad this way on iPadOS 17.

I would love to update with the ipsw on a PC without paying for iMazing.
Click to expand...
did you manage to update to iOS 18 from 17 via iTunes?
 
w_aldo said:
you’ll probably be holding out for a long time. If a fresh install doesn’t have battery issues then Apple most likely consider it a non issue. Not saying I disagree with you that they should fix it, I’m just saying they probably won’t…

I’m not having any battery issues on 18.2. So there’s nothing intrinsically wrong with 18.2 itself, just your “config” or there’s something going on which is specific to your device
Click to expand...
But the solution can’t be to do a fresh install and turn off several services/features.
Also I have my settings configured how I want/need them.
If it’s one of them, the outcome would be the same.

It‘s also weird that using the phone doesn’t need much more battery than having it in standby all the time.
Even after a reboot, the drain in standby stays the same.

I‘ve the same config on the 12p, where everything is fine.
Starting point for both iPhones (12p and 15p) was the same iCloud backup.
So it’s more or less impossible it has something to do with it.
The only difference is the number of active SIMs. (1 vs. 2)

Btw. I don’t have Apple Intelligence, I‘m located in the EU, so this can’t be a reason.
 
ATmahe said:
But the solution can’t be to do a fresh install and turn off several services/features.
Also I have my settings configured how I want/need them.
If it’s one of them, the outcome would be the same.

It‘s also weird that using the phone doesn’t need much more battery than having it in standby all the time.
Even after a reboot, the drain in standby stays the same.

I‘ve the same config on the 12p, where everything is fine.
Starting point for both iPhones (12p and 15p) was the same iCloud backup.
So it’s more or less impossible it has something to do with it.
The only difference is the number of active SIMs. (1 vs. 2)

Btw. I don’t have Apple Intelligence, I‘m located in the EU, so this can’t be a reason.
Click to expand...
I'm simply trying to help you with a solution. In my experience, a fresh install helps solve a lot of issues. There are so many things that can go wrong, especially if you haven't fresh installed for a long time and gone through many updates.

My phone has great battery life on 18.2, and yours doesn't. Yet you're not willing to listen to any of my advice and won't at least try some of the things I've suggested.

I strongly suggest you do a fresh install of iOS using a .ipsw (not from resetting in the device settings) and test it again without a backup. Then restore from iCloud, but only restore neccesary things. Use this as an opportunity to clean up and optimise your phone. Get rid of things you don't need, turn off settings you don't *actually* need.

You can't expect to have good battery life yet put 0 effort into actually optimising your phone. You can't trust Apple to choose what's best for you these days. You have to put some effort into it yourself. It's not a simple OS anymore.

Please show me a screenshot of your system services under location. I'm curious to see what you have enabled.
 
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w_aldo said:
I'm simply trying to help you with a solution. In my experience, a fresh install helps solve a lot of issues. There are so many things that can go wrong, especially if you haven't fresh installed for a long time and gone through many updates.

My phone has great battery life on 18.2, and yours doesn't. Yet you're not willing to listen to any of my advice and won't at least try some of the things I've suggested.

I strongly suggest you do a fresh install of iOS using a .ipsw (not from resetting in the device settings) and test it again without a backup. Then restore from iCloud, but only restore neccesary things. Use this as an opportunity to clean up and optimise your phone. Get rid of things you don't need, turn off settings you don't *actually* need.

You can't expect to have good battery life yet put 0 effort into actually optimising your phone. You can't trust Apple to choose what's best for you these days. You have to put some effort into it yourself. It's not a simple OS anymore.

Please show me a screenshot of your system services under location. I'm curious to see what you have enabled.
Click to expand...
I am not disagreeing with putting in effort to get a result, but read back through this thread. Several of us have done everything known possible, fresh installs with no iCloud loaded, brand new phones from Apple, contacting support and doing everything asked from them. None of these efforts have lead to better results. Again, I think some effort is needed, but what you are suggesting has not work. It's something within Apple that needs to be fixed.
 
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I was having battery drain issues, however, my phone just seems to have come back to life in regards to battery. The thing which might have worked for me was I turned off all the product improvement settings in system services. Please give this ago to see if it works for you.
 
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Sushb said:
I was having battery drain issues, however, my phone just seems to have come back to life in regards to battery. The thing which might have worked for me was I turned off all the product improvement settings in system services. Please give this ago to see if it works for you.
Click to expand...
What product improvement services you turn off ?
 
Sushb said:
I was having battery drain issues, however, my phone just seems to have come back to life in regards to battery. The thing which might have worked for me was I turned off all the product improvement settings in system services. Please give this ago to see if it works for you.
Click to expand...
Exactly. Even if you had this setting on beforehand (in iOS 17), the actual behind the scenes actions of these toggles may have changed.

So you cannot expect to keep the same settings and have no issues when upgrading iOS versions, as you really don't know what has changed.
 
ATmahe said:
But the solution can’t be to do a fresh install and turn off several services/features.
Also I have my settings configured how I want/need them.
If it’s one of them, the outcome would be the same.

It‘s also weird that using the phone doesn’t need much more battery than having it in standby all the time.
Even after a reboot, the drain in standby stays the same.

I‘ve the same config on the 12p, where everything is fine.
Starting point for both iPhones (12p and 15p) was the same iCloud backup.
So it’s more or less impossible it has something to do with it.
The only difference is the number of active SIMs. (1 vs. 2)

Btw. I don’t have Apple Intelligence, I‘m located in the EU, so this can’t be a reason.
Click to expand...
When did you add the extra SIM/eSIM?
As far as I know 2 cellular providers in one phone is draining the battery quicker than just one.

Could you test using just one cellular provider for a day or two to see if that solves the issue?
 
I have 2 SIMs active since the iPhone XS. (which lasted the whole day without any problems and playing Pokémon Go for an hour …)
I tried it with only one SIM active (removed the physical SIM) about a year ago, yes, with iOS 17.
It didn’t change anything noticeable back in the days (so maybe 5%), but I‘ll try again during my holidays anyway (I don’t want my work SIM with me, so it‘s in the 12p anyway).

Regarding the location services for the system: most of them are on, I travel a lot, need location based reminders, home automations and so on.

And regarding the fresh install: it really takes too long to get everything setup again without a backup. Not the iOS settings, but all those apps I need to re-authenticate (which isn’t simply putting in a user, password and MFA)

I‘m of course willing to put in an effort, but not at all costs.
I‘m monitoring it for a long time now, that’s why I came up with the idea it could be the cellular modem or its firmware.
Also because of the feedback of others here on this thread.
The only thing I see in common is the hardware. At least for now, until something new is coming up ;)
 
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ATmahe said:
I have 2 SIMs active since the iPhone XS. (which lasted the whole day without any problems and playing Pokémon Go for an hour …)
I tried it with only one SIM active (removed the physical SIM) about a year ago, yes, with iOS 17.
It didn’t change anything noticeable back in the days (so maybe 5%), but I‘ll try again during my holidays anyway (I don’t want my work SIM with me, so it‘s in the 12p anyway).

Regarding the location services for the system: most of them are on, I travel a lot, need location based reminders, home automations and so on.

And regarding the fresh install: it really takes too long to get everything setup again without a backup. Not the iOS settings, but all those apps I need to re-authenticate (which isn’t simply putting in a user, password and MFA)

I‘m of course willing to put in an effort, but not at all costs.
I‘m monitoring it for a long time now, that’s why I came up with the idea it could be the cellular modem or its firmware.
Also because of the feedback of others here on this thread.
The only thing I see in common is the hardware. At least for now, until something new is coming up ;)
Click to expand...
So the fresh install does nothing. Same battery issues pop right up. If @w_aldo were to go back and look at @TexasAggie013 posts, he received a brand new iPhone 16 Pro from Apple and loaded no data at all nor logged into iCloud. The results were the same. Still below average battery life.

While I do understand the thought process in doing so, this isn't the problem. It's software based, and Apple has yet to figure it out. It is odd that it only affects some of us and not others, but it's clearly not related to the data that is brought over in a backup.
 
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I have made a simple test.
1 day with iCloud connected
1 day without iCloud

Day 1 with iCloud
90% > 37% 3h28 SOT

Capture d’écran . 2024-12-18 à 23.25.40.png



Day 2 without iCloud
90% > 53% 3h27 SOT

IMG_1398.jpeg
 
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w_aldo said:
did you manage to update to iOS 18 from 17 via iTunes?
Click to expand...
No, I updated OTA. Both iTunes and Apple Devices fail with any iOS update for me. Had to have it restored at the Apple store. It is an iOS 18 issue since I have no issues with my iPad on 17. I don't think I will try again until someone else confirms it works. Makes me want to buy a Mac.....which, if I was a conspiracy theorist, would make me think is Apples plan lol.
 
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128a214ca75f1a27a4ed910c8ab125e0.jpg

Anyone have a clue what’s going on here with the mail app? I turned off all mail in the app yesterday because it won’t work on WiFi. Now today I see this.
 
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I forgot to charge my phone overnight. It dropped 20% in battery, all from Find My background usage. I’m convinced this is what is draining the battery even with little usage during the day. I had great battery life when I first got my iPhone 16 Pro before it drained like crazy. I did get an AirTag a few weeks after so maybe that lines up.
 

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