iOS 15.4 Battery Drain

Alancito wrote:

Tucch wrote:

"...We really need to have folks stop asking what our battery health is because many of us have 100% on our batteries, that's not the problem...."

Tucch ~ And what about folks who have old iPhones who don't have 100% healthy batteries? ...For them, the long process of applying an iOS update to their old iPhone with a weak battery can be the proverbial "straw that broke the camel's back."

Or what about folks who've replaced their battery with a non-genuine Apple battery that now incorrectly shows 100% when the fake battery is actually failing?

...Neither of those cases have anything to do with a faulty iOS. For that reason, we'll not stop asking for the iPhone model and Maximum Capacity %. Such basic info should be stated in the first post anyway – without having to ask and then finding out it's an old iPhone 6s with only 75% Maximum Capacity!

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Thanks for all your help.

Alancito wrote:

Tucch wrote:

"...We really need to have folks stop asking what our battery health is because many of us have 100% on our batteries, that's not the problem...."

Tucch ~ And what about folks who have old iPhones who don't have 100% healthy batteries? ...For them, the long process of applying an iOS update to their old iPhone with a weak battery can be the proverbial "straw that broke the camel's back."

Or what about folks who've replaced their battery with a non-genuine Apple battery that now incorrectly shows 100% when the fake battery is actually failing?

...Neither of those cases have anything to do with a faulty iOS. For that reason, we'll not stop asking for the iPhone model and Maximum Capacity %. Such basic info should be stated in the first post anyway – without having to ask and then finding out it's an old iPhone 6s with only 75% Maximum Capacity!

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BTW, one thing I forgot to mention before thanking you for all your help, I do have an old iPhone 6s that was very recently sent directly to Apple for a new battery and updated to the latest ios it could accept by Apple and shows 100% health. It has no apps on it other than what Apple puts on them and it still drains within a short period, even when powered off. It actually lasted much longer on the original battery with 75% health. Apple says nothing is wrong with the phone. Already done all the trouble shooting and spent long hours with their customer support and tried all the suggested fixes here with no solution. It was a back up anyway, but now my 6s is not even considered a backup. My mistake for getting a new battery put in by Apple.

This is just my experience and I am now not going to suggest this is happening to anyone else and apologize for any other posts.

So, once again thanks for your help.

SeeksPeace2020 wrote:

have you tried looking in your background refresh settings? Usually if they are all on it’ll cause battery to drain a lot quicker as ea app is trying to update/refresh all at the same time.

Yes sir just in case you're asking me, one of the first things that is turned off. Thanks

Extremely unhelpful response that turns this community into a toxic place. I have had at least 8 people reach out to me in the last month after 15.4 with similar issues. All iPhone 13 devices and their Apple watches (Series 4,5,6). Something is seriously broken and 15.4.1 nor 15.5 has fixed it. I have spent weeks disabling everything I can think of with only minimal improvement. Battery life is 1/2 to 1/3rd of what it was previously.

I think they are stating that they are experiencing regression in battery longevity.

Over the last month, I have multiple family members with mostly iPhone 13 (97%+ battery health) which are now getting 1/2 to 1/3 of their previous lifespan after 15.4. Even looking at usage, it shows only four hours or less of on screen and background time in the last 24 hours. Yet the batteries drain to zero within 8 hours.

Unfortunately Apple doesn’t provide us a way to determine what underlying subprocess is suddenly consuming extra wattage. Huge amounts of background system activity is not captured in the battery analytics. I suspect a loop in some system task, indexing process or HomeKit automation. Complete system reset isn’t a valid option for several for business reasons. It does seem to be partially tied to users with Apple Watches and something with the Bluetooth stack.

NileshKulkarni17 wrote: "...hope Apple issues a quick fix."

Nilesh ~ Tell Apple what you hope here:

iPhone Feedback

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ThomasLeeEvans wrote: "...Hope this information helps!"

It will help more if you tell Apple:

iPhone Feedback

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Morarkdersz wrote: "capacity 86%, last charge to 93%"

That appears to be normal for an iPhone X. So all we can suggest is to...

Contact Apple Support

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I have the same problem, battery drain from 80% to 20% over night, without using it

Stop…my phone was 80-90% charged..and took a massive dump. Here are photos of my battery graph. The steep battery usage is crazy

Yep. Everything is 100% Apple.

I also noticed this thing

Yes i own a 13 pro max. Earlier my battery used to last 2 days. Now after updating to 15.4, it gets used up in less than 24 hours.

hope Apple issues a quick fix.

I have an Iphone 12