IOS 11.4.1 Terrible battery drain

I had the same issue in iOS 11 for iPhone and iPad (iPad was worse). Calendar app was the culprit. Calendar on iPhone and iPad was consistenty 60%-90% of battery usage. What solved it for me was: removing (turning off) and adding back (turning back on) calendars for iCloud, outlook, gmail, yahoo (I have about 6 I sync with). I removed and then added back Icals that I subscribed to. Then turning all to Fetch except for iCloud - I kept that as Push. Then setting Fetch to automatic. Powered off and then back on. This worked in iOS 11 and 12. No more abnormal battery usage. I can’t say exactly which portion of that process solved the issue, but I’m back to normal now. Good luck.

Hello,

I am also having a battery drain issue on my iPhone X on iOS 11.4.1. Although Siri isn't the cause, I have no idea what is...

I am trying to do a DFU Restore right now as I am hoping this will fix the issue. I would also recommend setting up as new instead of restoring from a backup. This completely reinstalls the iOS Bootloader onto your device.

To enter DFU Mode you have plug your device into a Mac or PC with iTunes installed and open. Then, you have to quick-press the volume up button, quick-press the volume down button, and then press and hold the side button until the screen goes black. Once the screen goes black, quickly press and hold both the side and volume down buttons together for 5 seconds. After 5 seconds, release the side button without letting go of the volume down button, then continue holding down the volume down button for at least 5 seconds. Don't let go until you get a pop-up notification on iTunes saying that you need to restore. If you're screen is black and iTunes says you need to restore, you are good to go. If your phone restarts and nothing happens, you need to try again. If everything seems good, press the restore button on iTunes and set up as new once the process has finished.

Please let me know how it goes for you and if you see an improvement in your battery life.

Cheers!

I suggest that if you're having any kinds of battery issues right after the update, go to the settings and reset your phone to all settings and network settings. don't worry, it won't reset any apps or any data on your iPhone. And see for yourself if you're still experiencing any battery drain issues. Because every time i'm installing a software update to my phone, i always used that method and it works 87% all the time.

Tip: Often (always? dunno), with iOS updates, comes a reset of the battery voltage vs time profile. The phone will need to re-learn where your battery is in its lifecycle. While this doesn't explain the extreme battery drain situations, it's not uncommon for your phone to report a lower battery percentage than you're used to. Use the phone over a few charge and drain cycles, and the firmware will re-learn the voltage profile and begin to report a more accurate battery drain percentage.

So- probably the first thing we should all do is just wait a while and see if this problem is still there in a couple weeks. I've gone through this before.

Ringing Apple support, they advised installing IOS 12 - better performance optimisation - and to perform a factory reset to clear any errors in the firmware from previous upgrades. Having done this there is some improvement but WhatsApp voice calls do seem still to use up power more rapidly than they used to, and surprisingly Siri which is very definitely slower and even cuts off its own voice confirmation of carrying out the command! Disappointing from Apple but let’s hope bearable for another year or two!

I had battery drains on my 6s then disabled listen for hey siri and disabled location for eveything except maps , camera and find my phone. Worked for me . Give it a try maybe it can solve it.

I experienced the crazy battery drain as well but I figured out a solution that worked for me at least. Currently when I check my standby time and my usage time they are always the same so that means the phone is never really in standby. It is always in usage and my battery drains really fast. What I did to fix it was that I plug in my phone at night before bed and in the morning it is at 100% charge. I then unplug the phone and immediately turn it off and then back on. Once it turns back on I plug it back in for a few seconds so that the battery usage monitor registers that the battery is full. This way I can watch the standby and usage again. I watch my stats throughout the day and everything is back to normal. Give it a try.

OK, so on the Wifi page, whenever you go there, you will always see a spinning wheel. Even when you have a Wifi connection selected and you are connected through it, when you go to that page, it will immediately search for other eligible Wifi networks in the vicinity so it can list your options for choosing another one if you wish.

And not understanding the Hotspot issue? Are you indicating that when you go to Settings>Personal Hotspot, you can't turn it off?

When you go to Settings>Battery, what activity is using the largest percentage of battery?

Best,

GB

Try turning off all the apps that are under Siri suggestions.

My iPhone 6 and iPhone 6 Plus both experience battery drain of up to 25% per hour with update we 11.4.1 from 10.x. I will attempt to restore/downgrade to 10.x until we get a solution. This same phone ran for over 24 hrs b4 update but the day after update lasts less than 8hrs. No excuse pleas fix iOS ASAP.

I do not know, if it is some kind of work around or not. But, somewhere I saw an advice - if you are using 5Mhz Wi-Fi, so turn off Wi-Fi on your iPhone.

I have done it, after charging iPhone to 100%. At the moment, with turned on Location services and turned off Background Apps refresh, 15 mins and still 100%.

I have the same issue on my iPhone 5S. I went to the Apple store recently with 11.4 on my device, and the in-store tech showed me the diagnostics of my battery usage with some severe drops in power consumption, despite the battery being in good health (only a small percentage of it being used-up). The store technician recommended I factory reset my device to try and overcome the issue.

So, I've done that, and it auto-installed 11.4.1 which has turned my phone into almost a power-cord-reliant device. 1-2 hours in standby mode and it drains 33% of my battery from 100% to 66%. The only stop-gap to it is to put it into Low-Power-Consumption mode or Airplane mode. Airplane mode for my only line of tele-communication is not a solution.

I now have to keep this thing tethered to the wall after 4-5 hours of standby as it's almost dead after this time frame.

I've noticed it's quite prominent when I'm at work and on their wifi network. I've turned the wifi off to see if that causes any change - which didn't fix it either.

So all those articles stating 11.4.1 has fixed the battery drain are dead wrong - it's made it worse.

Thanks. I have never noticed that the wheel continues to spin next to “Choose A Network” even after a network is selected and joined. I did have to remember to tick the “Auto Join” button since apparently networks were reset.

I am just looking at items showing continuous activity that may be causing the excelerated battery drain.

What is happening with Personal Hotspot (under Cellular Settings) is that there is a spinning wheel to the right and tapping to access further settings has no effect. It’s like it’s busy and I’m locked out of making changes as long as that wheel is spinning. It is not a feature I have used…ever. I did a phone power off and on recycle several times this morning and the Personal Hotspot wheel finally stopped spinning (although it has since started the spinning/lockout behavior. More importantly I no longer see a continuous spinning activity wheel in upper left next to my Cell and WI-FI status which seems to have stemmed the heavy drain.

Battery usage shows Messages and Wunderground (weather) the highest percentage with 26% and 21%, which seems normal for how I’ve used my phone in past 24 hours.

Michael

Just wanted to add my bit to this conversation.

I updated my iPhone 6S and iPad Mini 2 to iOS 10.4.1, and battery life has been absolutely awful since the update (I didn't notice it being this bad with iOS 10.4).

If I didn't use my phone much, I used to still have over 80% charge at the end of the day, now I have mid 20% with the same use.

My iPad now needs recharging about twice as often as it used to before the update.

My daughter has an iPhone 8+. I asked her if she'd updated, and had she noticed a difference. She said she had, and now her battery lasts "half as long".

I tried restoring my iPhone 6S to see if that would improve matters, but after just being sat on my desk for 9 hours, it's down to 29% battery (so no, it hasn't improved it). That's with no apps open in the background, btw.

I've told my wife not to update her iPhone 5S. She doesn't have any problems with battery life, and she's still on 11.4.

This is now getting extremely frustrating. If I could backdate, I would (I only updated because I get fed up of the pester messages).

I've had iPhones and Apple products (iPads, laptops, desktops, AppleTV etc.) for the last 18 years, so I've really bought into the Apple ecosystem, with additional iCloud storage etc., but even I'm starting to get a little fed up with them now.

Draining the battery quicker increases the frequency of the battery charge cycles, so the lifespan of the battery could shorten by several years. Is this Apple's way of getting us to update our "worn out" devices more frequently?

Bob.

How much usage time do you get ? (Settings>battery>Scroll down)