iOS 18, along with the iPad counterpart iPadOS 18, is out and beaming its way onto hundreds of millions of devices the world over.
As with every iOS release, people are divided. Some iPhone and iPad users are impressed that their battery life has gone through the roof, while others describe the update's impact as abysmal, saying that not only are they getting less battery runtime, but that their battery health has plummeted, too.
Also: 8 ways I'm preparing my iPhone for iOS 18 - and I recommend you do too
If you've noticed your battery health has dropped off following the software update, I suggest reading this article on what Apple doesn't want you to know about your iPhone's battery.
Then keep reading, as I'm going to show you what the likely culprit is, what you can do, and what other factors could be behind the sudden battery drain.
The additional background activities following an update put more load on the battery.
The Battery tab can tell you a lot about how the iPhone, such as show you when it's charging and when it isn't.