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iOS 12 is eating my battery!!!

KishanKissoon said:
Using a 6S here. Battery life is definitely shot. Today it literally went from 84% down to 20% in 5 minutes. I had put the phone in my pocket at 84% and 5 mins later looked at it and it was 20%. When I got home I charged it and it took 20 minutes to charge to 100%. Not sure whats going on, atm is going down heavy with usage, maybe 1% per 1 minute screen time.
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How old is the battery? 20 minutes to charge 80% seems to indicate its having trouble reading the voltage. Might be time for a new battery
 
My battery life with my iOS devices have been cut in half. It’s worse with iOS 12 than 11. I can sit here and watch it go down several % every minute.
 
KishanKissoon said:
Using a 6S here. Battery life is definitely shot. Today it literally went from 84% down to 20% in 5 minutes. I had put the phone in my pocket at 84% and 5 mins later looked at it and it was 20%. When I got home I charged it and it took 20 minutes to charge to 100%. Not sure whats going on, atm is going down heavy with usage, maybe 1% per 1 minute screen time.
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Like others said, it's probably the battery percentage. Use the phone until it dies, then charge it back up to 100% continuously.

If that doesn't work, use iTunes to restore iOS 12, and set it up as new. That means no restoring from a backup. You need a fresh phone.

Manually back up your photos and other important stuff. Your contacts, notes, passwords, and messages are backed up to iCloud, so they'll appear as soon as you sign back in. Just don't restore from a backup. Set it up as new. 100% sure it'll fix it.
 
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My SE is now lasting all day but the % display is not behaving like it should. It’ll freeze at say 58% for a period of time then drop several % points in quick succession then freeze again at say 54%. Repeat...

Hoping a point update release will help before trying a full reset.
 
iOZZY said:
My SE is now lasting all day but the % display is not behaving like it should. It’ll freeze at say 58% for a period of time then drop several % points in quick succession then freeze again at say 54%. Repeat...

Hoping a point update release will help before trying a full reset.
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I'd guess you have an app crashing actually.

Does iOS 12 have the tools to diagnose or can we assume if it happens itll be so kind as to tell the user.?

An app on a thread lock, crashing or what is ommon ly, " temporary system freeze."
 
Not having this problem on my X - my battery is as good or better than was before IOS 12. I wonder if some common app is having issues with the new IOS

I also wonder if the new screen time app is using a lot of battery measuring and storing info. I went into settings and shut it off immediately after doing the install
 
dcp10 said:
How old is the battery? 20 minutes to charge 80% seems to indicate its having trouble reading the voltage. Might be time for a new battery
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Battery is like 10 months old, I let it die and charged it back to 100%. It seems to be stable again and working normally. BUT the drain it still doesn't feel like it lasts longer than it did on ios 11.4

It's weird cause the first 100-80% go down so fast, I took it off the charging port at 5:30 am, went to work, around 10 I looked at my phone it was at 89% (didn't use it, just did like 1 snapchat and 1 20 second phone call)
Now its like 9:30 and my phone is at 53%. (again barely any useage at all)

So what I think it that, when it goes to a lower percentage it stays there longer than when its at the higher percentage. It's really throwing me off.
 
My take on Battery for iOS 12

IPP 12.9 G2 LTE - seems about the same except for apps that use video. Battery draining is 30% to 50% heavier. This device was running the GP beta and this behavior was not seen. The device was factory reset for iOS 12.

iPhone 8+ - Work phone so factory reset is a last ditch option. Battery seems about the same. Not noticing anything drastically different. Update was via iTunes.

Apple Watch 3 - Nike GPS version - Battery used to last 2 days. Charged every second night. I am now finding I need to charge by the afternoon of the second day. Apps and usage has not changed.

If typical Apple release path, these should improve over the next couple of updates. The IPP and video is a major concern for me as I watch a decent amount of video on this device. My biggest chuckle is the Razer phone I use for my personal device. Gets usually the most use and has the best battery life in comparison.
 
ohsnap said:
My battery life with my iOS devices have been cut in half. It’s worse with iOS 12 than 11. I can sit here and watch it go down several % every minute.
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I'm in the exact same boat. It is easily 30-50% worse. iPhone X used to last ~12 hours with light use and it's 1pm now and I'm already at 50% (and have hardly used it at all).

I've done some research and all of the websites just say "it's normal, it's due to indexing, should stop within 24-48 hours". No, I updated days ago so this is not related to what happens just after an update.
 
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badlydrawnboy said:
I'm in the exact same boat. It is easily 30-50% worse. iPhone X used to last ~12 hours with light use and it's 1pm now and I'm already at 50% (and have hardly used it at all).

I've done some research and all of the websites just say "it's normal, it's due to indexing, should stop within 24-48 hours". No, I updated days ago so this is not related to what happens just after an update.
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Same issue here on a new SE. iOS 12 is the issue.
 
My SE is not my primary phone but used whilst cycling. Not good when your battery is playing up when cycling in the middle of nowhere! I've DFUed back to iOS 11.4.1 and and see what happens.
 
My 6s battery is not dramatically worse in iOS 12 but it’s enough to be annoying. Instead of finishing the day with 20% battery I’m generally at 5% or less. Not a huge deal but that could be annoying if I’m outside my normal routine day.
 
iOZZY said:
My SE is not my primary phone but used whilst cycling. Not good when your battery is playing up when cycling in the middle of nowhere! I've DFUed back to iOS 11.4.1 and and see what happens.
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Why not DFU it back to iOS 12 and set it up as new? That's what I did.
 
CaptMarvel said:
Nom nom nom.

It’s just normal indexing and should subside in a day or two.

If it doesn’t, then you panic.
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Wonder why after all these years and the same battery life issues after release, doesn't Apple add a notification after an ios update informing the user that indexing will eat up battery for a few days.
 
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I have a complete drainage on my iPhone 7, from 100% to 0 overnight, when phone is not in use. The battery on my SE runs fine. The problem is I cannot do a clean install because I will lose 4557 songs (in 48 playlists) which I installed manually (I never sync, so my music and book libraries on my Macs are empty).
 
iOZZY said:
My SE is now lasting all day but the % display is not behaving like it should. It’ll freeze at say 58% for a period of time then drop several % points in quick succession then freeze again at say 54%. Repeat...

Hoping a point update release will help before trying a full reset.
Click to expand...

Same thing happens to me on my SE. Giving me flashbacks to my iPod 6 which would do the same.
 
electronicsguy said:
Wonder why after all these years and the same battery life issues after release, doesn't Apple add a notification after an ios update informing the user that indexing will eat up battery for a few days.
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Because that’s not what’s happening with many or most people. I downloaded iOS 12 the day it was released. It’s been way more than “a few days” and still having battery drain.
 
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Hmm, got to around 6.5hrs of usage on iOS 11.4.1 but as soon as it hit the 10% battery left mark the phone just turned off without warning. Think this SE is toast
 

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I had some pretty bad battery drain the last week but a couple days ago I turned on low power mode at 100% battery and left it on all day. Ever since then, my battery has been phenomenal. I had my phone on all day at work yesterday (airplane mode while working) and it had only dropped 10% by the time I got off. 😀
 
myrtlebee said:
Same issue here on a new SE. iOS 12 is the issue.
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I did a clean install this morning via iTunes. Still the same draining problem. Hey Siri and background refresh for all apps off. Location services switched off except for a few things.

iOS 12 is certainly the issue for me.
 
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Battery life is about the same on iPad, it's just WiFi that seems to have issues every now and then, particularly when in my room, where it was never an issue before.

Hopefully the next update fixes it.
 
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