Battery drain after updating to iOS 13.3.1

Thank you for sharing your experience. I absolutely agree with you. They are doing the same thing they did earlier, purposely causing the battery failure.

Apple just isn’t the same anymore.

Years ago my fiance had a broken screen on his iPhone, so he went to an Apple store in Shanghai where he was told that they can’t provide a new one due to a number of reasons (known to them mostly). So the next thing he did was to write an official compliant letter to Apple, stating that forcing people into buying a new iPhone by refusing to fix the problem on the current one is nothing but a bad business. The very next day, he got a phone call from the store he had visited the day before telling him to bring his iPhone so they could replace the screen. The problems were addressed and solved.

Today, well, things are just not the same anymore.

I don’t buy that the BMO or BMU or whatever is at fault. Something is making the phones suddenly draw large amounts of power and get crazy hot within a matter of seconds. I doubt it is an internal short in the battery because the problem does not occur if the phone is not picked up. I believe the problem has something to do with the Graphics Processing Unit chip.

I am sitting on the fence. I was able to purchase a new never used iPhone 6S model 1688 very inexpensively. If I can trade my old 6S to Apple Give Back for $75, swapping phones will be less out of pocket money than replacing the battery. However... I reluctant to swap phones until I am sure iOS 13.x is not causing physical damage, and then I would be right back to having the problem.

i believe you can discount the story from Apple about something wrong with the BMO or BMU because many of us suddenly started having trouble simultaneously and the problem is being reported across many media platforms. It is far from an isolated incident.

I’m fully sure that the problem lies within iOS 13, to be precise with 13.3.1 on my phone. Battery drain over night is higher than 40%, when my phone isn’t in use at all, of course. So last night I left my phone with 96%, this morning it awaited me with 54%. There’s a big question mark above it all!

my original 6S needed a new battery which Apple installed. Worked like new for 2 months until 13.3.1. I took it back to the store and they deemed it to be the battery, anyway they gave me a brand new 6S which I had to set up with 13.3.1. That was done in mid January, so far so good. I will post if it goes bad.

The new battery was still under 90 warranty, after they finished their testing I believe they said the new battery caused a serious problem to the phone so it turned out less time consuming and cost to fix it so they gave me a new phone and it was identical to the old one. I was surprised they still had that model available. BTW they don't sell that model anymore but keep a supply around for warranty issues.

You touched on what I suspect is that iOS 13, specifically iOS 13.3.1 is doing something that is allowing the battery to permanently damage something in our phones that causes ongoing random power spikes to occur sporadically.

I guess the best approach for now is to get a $49 replacement battery and then go back within 90 days to demonstrate the replacement battery has apparently damaged the phone, with hopes you’ll get a replacement phone. Perhaps the replacement battery will fix the phone and that is OK too.

By the way, I am typing this on an iPhone X, and I can feel the back of the phone getting hot as I type. That would not have occurred before 13.3.1

I posted a few comments about my warranty problem that I haven’t fully talked about it anymore, anyway I suggest you you send Mr. Cook a respectful letter with a real postage stamp and address to the corporation. Sometimes the big guys at the top can give alittle push to those who develop these upgrades.

I changed my battery out because I had the phone for a couple of years and I did this before 13.3.1. If your battery health is not below 85% don’t bother getting a new battery. A new battery will not make 13.3.1 work better. I thought I read something that 13.3.1 was causing heat issues also. I believe that upgrade needs an update. So far the new phone is doing okay but my daughter texted me today that her work iPhone is now draining fast after installing 13.3.1.

A little more to my situation. I'm technical support for my parents. I set up and maintain their phones, wifi, security cameras, smart tv, ect.. We buy our phones at the same time, so if I'm not around and they have a problem, it's easier for me to remotely help them because we all have the same model. I usually update them at the same time.

So we have a little cluster. If something goes wrong with one phone, I know it's likely an individual unit problem.

All three phones were performing optimally before ios 13. They all reacted the same to ios 13. In the same manner. At the same time. One is not worse or better than the others. All suffered radically declining battery performance.

Here's another thing. With all three, about one day every couple weeks, the batteries perform perfectly. No rapid drain, no heating, nothing. It doesn't last the whole day though.

Now tell me there's no connection.

I've been talking with the Apple senior advisor today. I'm sending her my parent's logs. This should be interesting.

I hope the advisor can help. The tech people did a pretty nice job trying to help me out but none of them would say it was the update. A few years back iTunes had an update that caused Apple computers all kinds of headaches and the forum board lite up with complaints that went on for months, Apple never even acknowledged that they were working on a fix. I sent a letter to Steve Jobs and received a letter back from one of his senior people, couple weeks later they finally had an update to fix the original update. As a side note I was not the only one to send a letter. Now before I do any updates I wait to see how it's working with others first.

Found out BMU stands for Battery Monitoring Unit. It’s supposedly part of the battery. The Apple senior advisor told me that’s what the problem was with my phone.

I sent them the logs of my parents phones last Friday and will hear back from her on Thursday.

It would have been REALLY useful to know about this "the first few days may result in higher power consumption and less battery life" before I installed it. I would have picked a better time to do it. As it is I installed it right before vacation time and then had to worry about whether the battery would cooperate when I needed to show tickets and such.

2 weeks later still has battery drain !!! Restored iphone Still has battery Drain!!! Tried everything to stop it this removed apps and so on but Still has battery drain...Was fine until this CRAPPY update.. Apple needs to get it right again!!!!

I believe the, “solved,” answer to this question is spurious, though possibly well intentioned. Due to the proprietary nature of the iPhone hardware and software, we can’t say what, if anything, the 13.x.x iOS updates did to the phone or battery. I am beginning to suspect either the battery monitoring unit circuitry in the battery or something in the phone could even have been irrevocably damaged through mis-operation resulting from the update.

There is obviously something in play related to the updates because the overheating and short battery life are concomitant to the 13.x.x release. What is frustrating is the mute response from Apple, forcing users to go though the Genius Bar escalation process repeatedly when the support personnel have almost certainly heard the same complaint from manifold iPhone owners.

Well supposedly battery life should get better with time..... not so. Three weeks or more since the update and it’s rendered my phone useless unless plugged in as the battery drains so fast. Can’t email, text or talk without it going from 90%+ to 4% in 15 minutes. Also shutting off my medical controls for pain control....

I would switch back to an Android if I could but don’t have the control ability for my implants as the Iphone is exclusive for this. This is affecting me in more ways than one....