iOS 18 Battery Life Thread

[Mac_fan75]

The temptation to install the public beta onto my 15PM is strong lol watching this thread closely 😁😅

Beta is beta, next release could be a breaker or not but it feels pretty good on both devices. Also beta on my Mac Studio but did encountered some performance issues there but those seem to be resolved in 3 (different partition though).

 

[Stiille]

The temptation to install the public beta onto my 15PM is strong lol watching this thread closely 😁😅

Why not just try it, first do a proper backup of everything and then install the beta and test it out for yourself for a while.

 

[Stiille]

Ok so I’m wondering how much SOT you guys get with 15 PM - I am now on my second charge this day and I am from 80% down to 43% in 4 hrs SOT.
How was it on iOS 17?
I got my phone two weeks ago and I installed right away the beta of iOS 18, that’s why I am asking, I didn’t wanted to stay on 17.5.1 because it was such a bad experience for my last iPhone.
So yeah anyone wants to share their experience? Would be nice.

Edit: and do you use the 80% charge limit ? For myself I use it right of the first boot.

 

[HouseLannister]

If you have to charge your phone more than once a night, the 80% limit seems like a waste. It's like going to the buffet and grabbing the smaller plate, but making twice as many trips to the line.

 

[Stiille]

But I think it’s more a waste to set it to 100% because it’s beta and beta is not that good in terms of battery life right now

 

[HouseLannister]

I guess. To go back to the food analogy: I would never say I was going to cook 80% of a recipe. If I only end up eating 80% then that's fine, the other 20% becomes the dog's portion.

The question becomes: would a single cycle from 100% gotten you through the day or did you need to put 1.6 cycles on your battery (80% x2)? At least, that’s how my brain works.

 

[Khavik]

Isn’t it possible in beta to set charge limit? If 80% is not enough, set it to 90 or even 95. I don’t have beta yet but I guess 95% will be my target

 

[Stiille]

I think that everything above 80% will stress the battery to much, that’s why I set it to 80% and I used it excessively the last day, will try to use it a bit less and see if 80% is enough.

 

[oMc]

Charging past 80% isn't the "main" problem. What is the most stressful for the battery is being fully charged AND under load/stress. Like for example gaming with your phone plugged in. Or using the GPS/music in your car with the phone charging. I feel like the 80% charging limit has been designed for these kind of situations.

I believe the main metric that will affect your battery wear over time is the number of cycles. And there is little to nothing you can do about it.

 

[one more]

So you say the battery life on Public Beta is better than on dev beta 3? Did I understand that correctly?

I think they mean moving from DB3 rev 1 to PB1, which corresponds to DB rev 2.

 

[one more]

I have the feeling that beta 3 „newer build“ is worse in terms of battery life.
I spend ~5 hrs on my iPhone SOT and then I needed to charge my phone from 22% to 80%.
Now I use the phone for about 2 3/4 hrs and it’s down to 57% from 80% again.

I guess the battery life will be better in the last betas at earliest, right?

That’s the thing they fix at last minute, right?

Usually yes, the battery fine-tuning is at the end of the beta cycle.

 

[one more]

Isn’t it possible in beta to set charge limit? If 80% is not enough, set it to 90 or even 95. I don’t have beta yet but I guess 95% will be my target

Yes, in iOS 18 we can set it in increments of 5%, so 80, 85, 90, 95 and 100.

 

[one more]

Charging past 80% isn't the "main" problem. What is the most stressful for the battery is being fully charged AND under load/stress. Like for example gaming with your phone plugged in. Or using the GPS/music in your car with the phone charging. I feel like the 80% charging limit has been designed for these kind of situations.

I believe the main metric that will affect your battery wear over time is the number of cycles. And there is little to nothing you can do about it.

True, and not only for betas. For example, having your iPhone plugged in and having a FaceTime video call in a bright space will cook the battery.

 

[sokol363]

Since beta 2, battery is a joke. Calendar app drain 24/7. Uninstall app doesn’t help. Remove mail account also doesn’t help

 

[macfacts]

I think this thread should be locked until 48 hours have passed, as we all know the first 24 hours are out of whack, due to indexing, and meddling with new features, etc.

theres no new files to index.

 

[one more]

View attachment 2397899 Since beta 2, battery is a joke. Calendar app drain 24/7. Uninstall app doesn’t help. Remove mail account also doesn’t help

For me, the Calendar app used 53 min over 10 days. 🤷🏻‍♂️ Do you have a lot of shared calendars or subscriptions to constantly update?

 

[spinningfree]

Wondering if the next dev Beta gets good battery life.

Battery life is usually the last thing to be optimized before RC.

 

[HouseLannister]

It's not like they get to two weeks before launch and then hit the optimize battery button. It's more of squashing bugs with runaway processes, bluetooth stack issues, and wifi and cellular connectivity issues. It's a constant process and certainly does not stop at 18.0.0.

It's actually quite possible the battery life will get worse with 18.0 GM because the Apple Intelligence beta will start doing all kind of background NPU stuff that isn't being done at all now.

 

[mikelets456]

Why not just try it, first do a proper backup of everything and then install the beta and test it out for yourself for a while.

I apologize---what's the proper back up? iCloud? Or on my Macbook? I'm asking because I have restored from iCloud before but usually "phone to phone".

 

[Stiille]

I apologize---what's the proper back up? iCloud? Or on my Macbook? I'm asking because I have restored from iCloud before but usually "phone to phone".

In my eyes proper backup is cloud or Mac - just backup everything important to you, thats what I wanted to say

 

[sokol363]

For me, the Calendar app used 53 min over 10 days. 🤷🏻‍♂️ Do you have a lot of shared calendars or subscriptions to constantly update?

Any subscribe calendar. Just one from iCloud, Gmail and birthday from contacts

 

[Stiille]

Somebody I don’t remember where, said that it could to do with buggy calendar synch with iCloud.
Maybe disable synch in your iCloud settings?

 

[one more]

Any subscribe calendar. Just one from iCloud, Gmail and birthday from contacts

I use an iCloud calendar and public holidays calendar (fed to you by Apple automatically for your country). No issues there. So it is either your Google calendar (more likely) or birthday calendar that might be draining your battery so much.

 

[sokol363]

I disable both iCloud and Google. Wish me luck xd

 

[sokol363]

Nothing change :/ battery drain and throttling after few minutes 😭