iPhone Ridiculous Battery drain on 6S after 11.2.2 update

[Emiljabo]

Not sure. I just update as and when they are released so I updated from whatever version was before 11.2.2. The previous version was fine on my iPhone 6S. No problems at all.

 

[sbailey4]

Not sure. I just update as and when they are released so I updated from whatever version was before 11.2.2. The previous version was fine on my iPhone 6S. No problems at all.

Ah ok that would be 11.2.1. So 11.2.2 (not 11.0.x in general) is what you are determining as the cause. However, it only had a security update so should not have made any difference from 11.2.1. So there is most likely something going on with your setup. You can go back to 11.2.1 since Apple is still signing it but I doubt it will make any difference. I would look into what may be draining,other than iOS 11.2.2 itself. Also a common method to address battery issues after updates is to run the 'reset all settings' (not restore or erase) and let the device run until it shuts down, then charge it unattended for 45-1hr after it hits 100%. That is a known solution as it calibrates the battery to the new OS. To be clear, this keeps all data and apps but it does wipe out any wifi networks and ApplePay so those need to be set back up, as well as any non default settings you prefer. This is a relatively painless process and can be done pretty easily.

 

[ftaok]

@Emiljabo

if you have access to a Mac, you could try using Coconut Battery to see what the health of the battery is. While it's not 100% accurate, it could eliminate the battery itself as a culprit. Otherwise, you're just guessing.

I will say that mine and my wife's batteries suffered on that first update from iOS 10.3.x to iOS 11.0 (or 11.1 in my wife's case). It was explained to me that the OS has to do some major indexing in the background after a big update. Took about 2 or 3 days before the battery went back to semi-normal. Not as good as 10.3, but within 90% or so.

 

[marf1million]

I had this exact same problem. updating to 11.3 beta solved it.

 

[Agent2015]

Thanks for the comments.

I have not tried a complete factory restore yet. I was hoping to not have to carry out such drastic action simply because I upgraded my phone to the latest operating system.

100% due to the upgrade. Battery was excellent beforehand and it was instantly terrible after the upgrade.

I see that the issue is a bit hit and miss on the other topics where people are having this issue. I will wait a few more days to see if it is taking a silly amount of time to index, but if not any better I'll restore.

My faith in upgrades on all of my Mac products is slowly dwindling. Gone are the days of not worrying about whether an software update will adversely affect my Mac or my other Apple devices. Seems like Apple are starting to take a leaf out of Adobe's book.

Have some faith my friend. I have in my environment an iPhone 6 (new battery), iPhone 6s Plus (new battery), iPhone 7 and iPhone X all previously on iOS 11.2.2 then 11.2.5 and now iOS 11.3 beta 1. In all instances I can report excellent battery life. As Helmsley mentioned start with things like Facebook by switching off auto-play videos a notorious power hungry app. Do you use VPN clients? They can hang draining your battery quickly. Ultimately it will probably be best to do a full restore. Start with vanilla installation so you can gauge if it's a potential hardware problem. Then start bringing back apps a few at a time until you isolate the culprit. Good luck!

 

[Bawstun]

Thanks for posting. I wanted to see a confirmation that my 6s should stay on iOS 10.3.3.

Lol. Every device should stay on 10.3.3

 

[poorcody]

I can add I have the same experience with my iPhone 6s+. Upgrading from the latest 10 to 11 had instant totally bizarre battery behavior. Sometimes I can literally watch it dropping percentage points every few seconds. Oddly at other times it seems normal for many hours in a row. But it happens to me everyday now, and the battery was perfect up until the day of the upgrade.

I have gone through everything I can think of: restore, setup as new, turn off all location services, all background apps etc. There is some bug that just triggers some random process or device to drain quickly, that obviously affects only a subset of users. But it makes the phone almost unusable.

This is why Apple not letting people downgrade at least one version is really arrogant. Their software is not "perfect enough" for that kind of attitude. No one's is.

By the way, I have the same set of Apps on my 10.5" iPad, and have no battery issues. I suspect it has something do with GPS, partly because my iPad is WiFi, and partly because that seems like the only device in the phone that can chew through the battery so fast. But just speculation.