iPhone battery drain since iOS 15.7.1 update

Since updating to iOS 15.7.1, my iPhone 7 battery level goes from 95% at 9pm down to 0%-3% by 7am next morning, and that’s with almost zero use and NO apps open/running. My phone used to be able to idle for days between charging. I had battery replaced 1 year ago and Battery Health shows 97%.

Any thoughts?

My iPhone 6s already had a bad battery. I replaced it once, but it didn’t help much. I saw that iOS 15.7.1 was a “important security update”, but then it destroyed my phone. Pretty sure it was a fake update.

I Have had the same type of battery readings. But I don't think it is real. The power goes down very fast without heating the unit. Which is impossible. It can go down from 90% to something like 10% and a very short period of time. What I have found out though is if I turn the unit off and back on again It is often back up to 90% or if I don't turn it off and attempt to charge it it will go from 10% to 90% in just a matter of 10 or 15 minutes. Also impssible. I don't think there is a battery problem. I think there is a software problem.

updated my wife's 6s to 15.7.1 last night - it has completely broken the battery usability. Goes from holding a charge for a couple of days to losing it completely in about 5 seconds. A few minutes on Google shows that it appears to be fairly common, almost as if it's a deliberate policy by Apple to make products obsolete. This change in battery performance occurred instantly after the 'upgrade' so I don't accept that it is due to natural degradation. Will be moving to Android based phones.

My phone does the same exact thing with 92 percent battery health. I think it’s done to get people to buy a new phone. Since I updated it has gotten worse with iOS 15.7.1 as you had mentioned. I finish charging my phone to 100 percent before bed and the phone drops to 20 percent by the time I wake up. I had iOS 13 just before and it was manageable only dropping one percent an hour without any use. There is no reason the phone should be dropping more than one percent a hour not doing anything at night.

now I also have another iPhone which I refuse to update which is running on the first factory iOS which has a battery life which is almost the same as how I got it out of the box. Only drops five percent when I am sleeping.

the issue is many aps now require the latest iOS to work or else you can’t use them. Also the web browser if you don’t update iOS you can’t load web pages. So if you are fine with a basic phone on old iOS- then no problem

Also I did get a new phone, but it has a weird problem and I don’t want to send it in. These new phones are annoying, especially ones that lack a home button. Even the 7 is bad. It doesn’t have a separate headphone jack.

Same here. My battery health is 80%, and all was fine until I upgraded to IOS 15.7*? I was on IOS 14 before and the battery would last about 5 days! Now, it's draining within 12-16 hours. And it will suddenly go down to 1%, then I do a soft or hard restart and it jumps up to 88% (on low power), and then I can literally watch it go down in 1-2% increments every few seconds. I have nothing running the background etc.

For the first 72 hours after an update while the phone is reindexing spotlight it will use more battery. If it persists after that go to Settings > Battery > Health and see what the percentage is. If it is 80% or lower you need a new battery.

DJDools wrote: "If it's simply down to battery health (mine is 80%), then why did the issues arise once upgrading to IOS 15.7*?"

Simple: The long process of applying the iOS update put strain on your unhealthy 80% battery and was the proverbial "straw that broke the camel's back." (Users often mistakenly blame the iOS upgrade instead of their weak, degraded battery.)

And don't wait to replace the battery – as they tend to fail gradually and then suddenly. You may then find that your iPhone is 'bricked' and you can't prepare it properly for battery replacement.

iPhone Battery & Power Repair

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ios 15.7.1 just kills the battery. there is an hour to complete discharge. In the cold, it discharges from 100% to 1% in a couple of minutes!!!

I’m sure they want us to get a new phone every year, but here I am, posting this with my iPhone 6s.

iOS 16 has been annoying recently. I preferred earlier iOS anyway.

No actually, ios 15.7.2 is available now for public update after the trail with rc, you must try with this update and so far after updating to this software I’ve tested it with my Geekbench software performance was good and likely to be from ios 15.7, scores were good, battery is expected to be fine but nothing gone wrong till now

The lowest score by ios 15.7.1 and the better one is given by 15.7.2

How old is the SE? It is normal to expect battery capacity to drop an average of about 1% a month.

A 92% reading would tell me that on average, your phone is about 8 months old. If your phone is 12 months old, you are doing great.

Your Battery Health / Maximum Capacity should be about about 82-84% if the phone is 18 months old.

Your battery is doing amazingly well. My phone is about a year old at this point and the battery health is at 89%.....right on schedule.

My battery has dropped after EVERY iOS 15 update.

Too bad Apple does not allow us to downgrade to iOS 14.8.

I have already turned off everything...

I hope 15.7.1 is the last iOS update, because if it is not, the next one will ruin my battery completely.

By the way, how is your battery now ?

What have you managed to do to improved it?