iPhone charging issue after iOS 27 update

I have the same issue. The phone starts charging suddenly after connecting to the charger but stops charging quickly. I tried to charge the phone using a laptop instead of a charging dock. The same thing happens. But the interesting thing is only charging stopped and phone not disconnected from laptop. Also, a normal 5A charger works. Only fast charging is not working. I'm pretty sure the problem is in the iOS software, not in the charging port.

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Try going into settings, battery, turn off percentage. I’ve just done this and it has fixed the issue on my se gen 2.

was not charging through the c charger after latest iOS 27 update.

I have the exact same problem! Since updating to iOS 27, the charging animation lasts a few seconds and then stops, even though the iPhone is charging. Worst than this, is the uncertanty in the battery percentage I have left, since it always display a random percentage... I've been through a whole day, with the iPhone displaying 4% battery... This is happening on an iPhone SE 2nd generation, with a very recent battery that had no problem on iOS 26

I am having same problems. Its only charging when I am attaching the lightning to usb c cable from the iPhone to MacBook. Its presumably charging at 5W but surprisingly it charged upto 80% from under 20% in few minutes. After 80% it slowed down possibly due to optimising battery tab being on. Its not charging with 35 w wall socket apple charger. It goes green for 2-3 seconds and then stops. My battery has 100% battery health so its not a battery issue.

robertfromrantoul wrote:

Does the algorithm change with iOS updates?

Yes, Apple refines the algorithm as data is acquired from each specific model battery. It’s not a one size fits all. The algorithm is also a smart algorithm, meaning it learns about your specific battery, use conditions, storage conditions and modifies the charging to best adapt to the current battery conditions.

So, after an upgrade or update, charging and battery behavior may change. In general the algorithm becomes more accurate, law of large numbers. The more information and larger the sampling group the more accurate the results.

It is ether a BUG or apple is preventing us from using random chargers. with original cable it works, but with a usb to lightning is starts charging for a second and disables. For sure it is software related. it started right after 27.0.1 update. battery health is 86%. Maybe they are trying to force us to change the battery...

I am having the same issue. It was charging okay before this update. The cables I use are fine. One of them is new. The phone was replaced by Apple a few months ago. So, it isn’t the battery. It definitely appears to be a glitch with the new update, which I hope another update with a fix is released asap.

I contacted Apple official support, the person was very polite and tried the most to be helpful.

I described exactly this issue, send videos, photos, etc.

To my great surprise I was told that there is no official complaint, worlwide, regarding this issue.

The best way to get Apple to release a fix for this is if everyone having this problem reaches out to the official support channels.

I conducted a thorough search of this forum using the term 'Charging Issues after iOS' and uncovered numerous posts detailing similar issues across various iOS updates. This suggests that iOS updates may not consistently be the root cause. Below are a handful of examples extracted from the search results:

These are just a few examples....

Charging problems after iPhone 12 Pro update to iOS 16.4.1

Problem charging with power bank after update to iOS 18.3.1 (iPhone 15)

Iphone 11 charging issue after ios17 upgrade

Slow charging after update iOS 24.2.4

Re: Problem with charging iphone after updating to iOS 16.5.1

Charging Issues After iOS 12.0 Update Install

Reports of device lag appear across all models and iOS versions in this forum, suggesting the issue is device-specific rather than tied to any particular iOS version or model.

Seems like the same issue as here: Problem charging iPhone se2 in ios27 - Apple Community.

This is an iOS 27 issue regardless of battery age.

Not a battery issue

Read bnt789’s comment above. It’s not an “old battery” or “unauthorized battery” issue. It’s an issue with 27.0.1 and I wish I had not updated!

This discussion thread may help you --> iPhone SE (2020) charging issue after iOS… - Apple Community