iPhone battery drain after updating to iOS 16.3

SOLVED (at least for me) : I had a similar experience after updating my iPhone 12 mini to IOS 16.4. All the good advices out there didn't help at all for me except one : RESET to factory the iPhone. I even went through a battery change a week before resetting.

I restored from my iMac backup and all went fine, including Google Authenticator (although there I accepted to "backup" the data to google beforehand - just to be safe - but it was not needed rinse I was restoring to the same iPhone).

Some apps needed to be re-linked (such as banking apps) and while I was able to reconnect to the Signal messaging app, all previous conversations were lost (but I have them in full on my iMac).

I have 16.5.1 on my brand new iPhone 14. I’ve had this phone for three months. Since the update, which was a week or so ago, my battery has been awful. It was lasting all day and now I’m lucky if I get three hours. And I’m talking it’s going from 80% to 20% in a matter of minutes. It sat in my purse all day while I was taking a course. It was 100% when I started the course then went down to 20% not even four hours later when I went on break and took it out of my bag. It wasn’t overheating and it was in a very cool, air conditioned room. I’ve checked my battery health, it’s at 98%, then I checked all my apps and none are running in the background. What is going on!? How can it drop that much after not being used!! Even my old iphone, which I had for years and the battery was crap, wouldn’t drain that fast.

After the last update about a month or so ago, it Dec 21 2023 now, my iPhone has many problems like the battery is draining within hours. Lots have changed almost like a new phone! When I send pictures or things through texting many are not going through!!

Battery drain after downloading ISO 16.3.

Kh7575 wrote: "I’ve tried all the tricks mentioned..."

Including this one?...

Restore your iPhone to factory settings

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Battery performance is very Bad . My XR New battery health 100% plz help me bro ?

Same issue

Same issue here with iOS 16.3. I charged my 13 pro max once in two days. Now I charge once per day. No new apps were installed. It‘s pure 16.3 issue

Battery drain after updating to 16.3

After updating to ISO 16.3 on Friday January 27, 2023 my battery life has been draining really fast, iPad Pro m1 11 inch . Anyone else having this experience?

Updated 14 Pro last week and watch my battery drain while it’s charging. How careless of Apple but not surprising.

86% maximum capacity and nevertheless drain, with 16.3 only a bit better than 16.2

16.3.1, a week after installation, experience: it made the draining even worse than 16.3

Yup , installed 16.3.1 and my 11 month old IPhone 14 Pro with 88 % battery health is dying at 11:00 am - customer service were pleasant but gave me standard “tips”

It’s happening to me too.am using iPhone x