iOS 15.3 battery drain

I wanted to wait for at least one full charging cycle to see if it really works before possibly sending people down a rabbit hole but here’s the poop on what I did. Go to Settings > Battery > Battery Health. Then I turned off the Peak Performance Capability and Optimized Battery Charging. As far as I know these features were added for newer models of iPhone and not fully compatible with the iPhone 6s.

So far so good but I’m not fully convinced yet that it will fix my issue until I go thru a couple charging cycles.

What do you call quickly? More than 1% drop in health for every month since the phone was new? Only quantitative evidence is of any analytical value, so come back.

I should point out that the original poster is talking about daily battety use, not battery health.

Have you heard anything back? My mom's phone does exactly the same since the OS update, and she keeps it plugged in all the time to avoid it randomly dying in minutes - it's nuts. For those who think this is a battery condition issue, we've had other similar experiences with friends and family - various models of phones with battery health ranging from 99% to 77%. It's got nothing to do with battery health or excessive usage - and it's surprising that there's not even been acknowledgement of this issue by Apple.

"...it's nuts. For those who think this is a battery condition issue,..."

There is no single cause. If the evidence you give suggests a duff battery, such as 77% health or draining while turned off, we will suggest a new battery. If the evidence points to incompatible apps or settings we will suggest getting rid of whatever you have installed that needs updating, or is totally unnecessary like antivirus and VPN.

It is NOT iOS in this instance. A billion other users are just fine.

My iPhone and battery were running perfect until I updated to iOS 15.3 just 2 days ago...

Yesterday morning my phone was charged to 100% as it is every morning and there was absolutely Nothing Opened or Running on it as I don't have time to be on it in the mornings, plus, Everything gets cleared/closed Prior to charging.

Plus, I don't Download, Upload or whatever load. I don't even have all the Apps that originally came on my phone at time of purchase bcuz I don't use alot of apps.

I have no music etc either!

Anyway, I unplugged my phone from the Charger, I went to work and by 12:00 - after being at work for only 3 hours, I went to use my phone that was in my car on a cool day for the 3 hours and to my surprise, the Battery was at 1% and the phone was quite Hot even tho the car was Cool!

So that IS quite a FAST battery drain and who knows, it could've been less than 3 hours. It just happened to be 3 hours when I went out to my car to use and look at my phone..

And now today, I see the battery Draining super Fast again, (From 100% down to 21% in less than 30 minutes) and with NOTHING Opened or being used. So I check my Battery Life and it says that my battery is "Severely Degraded" and "Needs Service"???

Again, there is Nothing opened on my phone!

I was just waiting for a business call!

And Yesterday, after Charging my phone again, I did a Restart and a Force Restart as suggested as a possible Fix, and obviously it hasn't helped due to how Fast the Battery went Down again today!

Apple definitely Needs to FIX THIS BATTERY ISSUE that's been happening Only since Apples Recent iOS Update, and especially since each of us on here are Not the 1 and only who are Having this Battery Issue SINCE Only Updating our iPhones as per Apples Request!!

So, for someone to say it's Not a Battery Issue, I beg to differ and say it IS a Battery Issue and that Issue has only been caused via Apples Recent iOS Update!

I wish I could Go Back to the Previous iOS version bcuz this iOS 15.3 version is Horrible!

Apple has really been Failing lately with its iOS Software Updates!!

I wonder if it's someone New to Apple who doesn't know any better and is faking it til they make it, or IF it's someone working for Apple purposely targeting iOS users?

Kinda makes one wonder, especially with all these Update issues going on After Updating!?!

Come on Apple, READ our Reviews and please put out a FIX for this BATTERY Issue, especially since the Majority of us are having the Same Battery Issue other than those who seem to think it's Not a Battery Issue.....

In my opinion, It's a Battery Issue caused by the iOS 15.3 Update!

Kaycee-1 wrote: "...So I check my Battery Life and it says that my battery is "Severely Degraded" and "Needs Service"???..."

Kaycee ~ What model of iPhone is it?...

Settings > General > About > Model Name

And does it still have its original battery?

Also, what's the Maximum Capacity % here?...

Settings > Battery > Battery Health

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It's an iPhone 8 that has been running perfectly, with the battery lasting 2 or more days up UNTIL I did this Recent iOS 15.3 Update earlier this week to which the battery now Drains super Fast.

Infact I just took it off the Charger to check my emails and in less than 1 hour it's already down to 65% and losing charging strength almost every minute and with nothing else open or running.

But I don't have stuff Running anyways bcuz I don't use music apps and I don't use or play online games etc...

Also, when I went to unplug it a short while ago, it was very warm after being on the Charger for several hours.

This also never occurred prior to this iOS 15.3 Update!

Anyway, thanks for getting back to me and I look forward to seeing what you think...

K

Kaycee-1 wrote: "It's an iPhone 8..."

Okay, and my other two questions were::

...does it still have its original battery?

Also, what's the Maximum Capacity % here?...

Settings > Battery > Battery Health

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After embarking on a software update on my iphone Xsmax from ios 14.2 to 15.3, I acknowledged not a depreciating or alleviation of battery health but changing the state of my Battery Health from 94% to an instant battery service so I wanted to be very certain if the software update was the causative factor to the current condition of my battery

That's exactly what happened to my iPhone 8.

I keep my phone updated all the time and this is the 1st time I've had serious issues with an iOS Update...

My phone not only went from my battery still being 92% after almost 4 years, due to my not using it for alot of stuff other than important calls, texting my kids and the odd google search, but it also said that my battery was in Severe need for Service!

And the fact that it Drains alot Faster now with the 1st time going from 100% down to 1% in less than 3 hours!

It's not Draining that fast now but it's still Draining alot Faster than it used to.

My phones battery would last 2-3 days, now I don't even get 12 hours out of a full battery charge!

And I absolutely Know without a doubt that it is from the iOS 15.3 Update, so I'm

Totally Not Impressed with the iOS 15.3 Update!!

Just sad that they won't admit it or do something about it, especially when there's others having the same or similar issues!

Kaycee-1 wrote: "...And I absolutely Know without a doubt that it is from the iOS 15.3 Update..."

Kaycee ~ The long process of applying an iOS update can strain a weak, aging battery and be the proverbial "straw that broke the camel's back". To determine if that's the case with your iPhone 8, please answer the following questions that you've been asked twice before:

Does your iPhone 8 still have its original battery?

What's the Maximum Capacity % here?...

Settings > Battery > Battery Health

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I have an iPhone 12 Pro Max and experiencing the same problem. My phone was working very well before, but ever since I upgraded to IOS 15.3.1, the battery drains very fast. In the past, I can use my phone for the whole day without charging, but now my battery can only last for half day. Apple used to placed a trick in IOS to force customers to buy new phones. I hope that kind of trick is not being played again here!

What, newer than iPhone 12?

This is a conspiracy theory of the most illogical type. They produce updates that can be installed successfully on 5 year old phones with zero problems.

Your difficulty with updates or settings or apps is personal to you and should not be confused with any Apple master plan you may have imagined. The remedies have been posted many times but I see you went straight for post number one and replied from there without reading.

Did you read my post carefully? It has nothing to do with the update process! It is about battery drain after the update. None of the posts provides a solution. I did read them. This is not a conspiracy theory, it has actually happened in the past in the older iPhones!! It happened to me with painful memory😡