Unusually high battery drain is a symptom, not a problem. There are many possible causes for this symptom. In theory, as many as there are apps installed on the phone.
Sudden change in battery drain is caused by an app or apps that are using more energy than they should. It can happen at any time, but is slightly more likely after an update, because the update process interrupts apps in the middle of some activity, either foreground or background, and some apps do not recover cleanly and get stuck attempting to repeat a failed data update, essentially forever. Killing the app doesn't always resolve it, because the real problem is data that was corrupted by the interruption, and the app will continue trying to recover the corrupted data after it restarts.
MS Exchange email accounts will do this frequently, due to a bug in the Microsoft ActiveSync process which, unfortunately can never be fixed, because it would break millions (billions) of older MS Exchange clients that cannot be updated. If you have an MS Exchange account the only fix is to delete the account, restart the phone, and add it back. Or have your administrator restart the MS Exchange server (which most admins don't really want to do). If you are interested I can provide technical details on this bug, but I don't want to distract from solving the problem.
Other IMAP email accounts can exhibit a similar problem; again, the easiest solution is to delete the account, then add it back. As the email server is always the master for IMAP accounts no messages will be lost.
Accounts that sync data from a server (and this includes iCloud) can get out of sync between the server and the iPhone. Given enough time this can resolve itself (at least for iCloud), but it's easier to shut down the sync service, restart the phone, and start it up again. Yes, even for iCloud syncing. And I had to do this over the weekend when my iCloud Contacts stopped syncing correctly. It took about 14 hours for my contacts to again sync.
As many 3rd party apps sync with a server all can be suspect. That's why checking to see which apps are using the most energy in Settings/Battery is a good diagnostic step.
I also have a battery drain problem on my 6 since iOS11. The phone is somewhere between 30-70% and works great then goes straight down to 5-10% then shuts down. When I restart it it's back where it was somewhere between 30-70%.
On top of that my GPS is now almost never working anymore since the update (like for thousands of other users).
This seems like a really bad update and we have yet only been offered "support" but no solution to fix our very expensive phones.
The fact that not all iPhones (like the couple's phones above) have that problem does not mean that the problem does not exist at all.
I have an iPhone 6 that has been having battery issues for some time. Updated to 11.2.5 yesterday only to find that those issues have become even more concerning than before. Even a simple task, like replying to a message, seems to be an ordeal — I can actually see the battery percentage decreasing fast. My device was fully charged this morning, then I left home for work and had not used it for the next hour or so. When I did use it, battery was already at 80%. So, 20% of the battery just drained without no usage of mine.
I'm seriously considering moving on to an Android device. I love Apple products and its operating systems, but they are useless without battery life. It would seem Apple is trying to sell a Rolls-Royce car with a FIAT engine. Shame on you, Apple. We expect better from you.
It is all fine and dandy reading over the iPhone battery and performance stuff but does not explain how in the 2.5 hours since I took it off the charger and only have about 5 mins screen time and not running any apps in the background does the battery drop to 85% and the Usage and standby times match.
Exactly the same here with the iOS 11.2.5 update, battery on the iPhone 7 is in bits, fully charged at 11pm, down to 32% by 6.30am without being used, horrific and needs to be sorted, the lack of communication is terrible
I spoke with management at Apple customer care. She treated me as if I was trying to pull a fast one on her. Just because they iPhone 5s is older. The battery was performing just fine. Just days before I used Waze for an hour drive and it worked the entire trip. First bad customer service experience with Apple I’ve ever had. Her bias made it impossible to communicate with.
I just noticed the same thing! I'm extremely disappointed and annoyed because I recently switched back to iPhone from Android after 10 yrs. I thought ios was bulletproof and would provide absolute stability. I didn't have any problems with Android. Just was looking for a change. Boy was I wrong! I should've trusted my gut and all the reviews of the declining reliability of iOS. I was willing to sacrifice the hardware advantages that Samsung and Google had over Apple. Now I'm stuck with a $700 phone that has worse battery life than a samsung in 2014 and the same hardware specs from Samsung in 2015. ***. THANKS APPLE....
I this is not helpful. My phone is doing this too. I spent 1/2 a day jumping through hoops with Apple to only have it act up 3 days later. Apple is intentionally screwing with people’s phones now. I’m seriously considering turning in my 10 Apple devices ranging from computers,Apple TVs, AirPods, phone, watch, ipod, and iPad and being done. This is a big inconvenience.
Same here on my iPhone SE and even worse on my iPad. It’s so bad that even recharging while using the iPad is not enough to keep the battery from draining fast. Normally I can use my iPad for two days without charging, and i always charge around 30%. Today the device depleted twice with an actual automatic shutdown while doing some browsing and watching YouTube videos. Apple should fix this ASAP.
When I started this reply my device was at 12%. I kept it plugged in (official wall charger) all the time, now the battery level is 9%. That is just ridiculous.
Tried this and after restarting my phone, no battery usage and standby available, so tried again, still no joy. Suddenly my battery dropped 10% in 5 minutes and the phone (iPhone 6) became really hot. Hope this hasn't messed it up even more. Now back on charge.
I have the same issue! Updated to 11.2.5 and battery drains over night by 13% while the phone is on airplane mode! Unbelievable! Also, battery stats shows the same time for idle and use! I never saw such stats. It only started with 11.2.5. I have an iPhone X and I’m very disappointed. This is not what you expect to get when buying the most expensive phone. Really srated to think that I need switch to Android, which is more reliable and not baggy.
Apple you are falling down!
Same here... before i update ios 11.2.5, my iphone is not problematic on the battery. but after I update and there is a problem on my iphone battery. I usually charging my iphone up to 100% and can be used all day. I only charging at night only. but in ios 11.2.5 is very annoying. I have to charging my iphone 2-3 times in one day. and I feel the heat many times on my iphone. really annoying! please correct this problem. almost all iphone users in Indonesia experience it. this is so bad!!!
Same here. I had 6plus after upgrading to 10.3 the battery drain issue started. apple advised that battery is of good health no issues. I was forced to upgrade to 7plus. it was fine until i updated to 11.2.5 after update battery drain baittery drain issue started. apple support repeats the recorded message like what i heard during my 6plus days. They have to realise that they release faulty updates and the users has to suffer for that. I am felt being let down by apple. thing time to switch to android. **** with Apple.
This boilerplate response does not it knowledge the issue, which is rapid battery drain that arose only after the 11.2.5 update. I hope this doesn’t reflect that Apple does not think this problem exists. It’s over 1000 people who say they have the same exact problem, then it very well might.
bought my first iPhone (5s), very expensive in my country, I’m mad at this, how can this even be possibble?
100% charge won’t last moren Than 2 Hours at a regular use? Not even saying what happens when you play a game or use YouTube. This is outrageous. They will Fix this? I tried every fix that you post in this thread but none worked for me. Have they said something about this? What can I do?
Sorry if my english is bad
My iPad Pro 12.9 1st gen has awful battery life. The battery has been draining within minutes on iOS 11.
I hope Apple focuses on battery life and performance, this is ridiculous. This iPad has been replaced and is only like 6 months old and performance has been okay and battery life is miserable from time to time...
IOS 11.2.5 battery drain
