iPhone 16 pro max battery exploded/back is coming apart from swelling

Battery swelling is generally not an instantaneous phenomenon. It is usually a gradual process that develops over time as gases accumulate inside the battery due to internal chemical reactions or battery degradation.

In many cases, there may be early warning signs, such as the display lifting slightly, the back panel separating from the frame, unusual gaps appearing along the edges, or the device no longer sitting flat on a surface. If these signs are ignored, the swelling can progressively worsen, eventually bulging and distorting the iPhone's back panel or even pushing the display out of its housing.

Therefore, it is not entirely fair to blame the battery alone without considering whether the early warning signs were noticed and acted upon. A swollen battery should never be ignored, particularly because it can pose a fire or safety risk.

The important point is that a battery may develop a fault, but ignoring the symptoms can allow a manageable problem to become a much more serious one.

If swelling is suspected, stop using and charging the iPhone, do not press or attempt to flatten the battery, and have it inspected by Apple or an authorised service provider.

It's definitely not an iOS issue, your problem is coincident with the update, not due to it.

Regardless you must have your device serviced, your current situation is dangerous.

stormierl97 wrote:

shortly after ios 27 update ,

Not every issue an individual encounters on their device can be attributed to an iOS update. iOS 27 or later may have coincided with what you are experiencing, but that does not mean the issue was triggered by iOS. Coincidence in timing is not, by itself, evidence of causation.

If the update itself were the root cause, then every device running that same version of iOS would exhibit the identical problem. In such a scenario, the forums would be flooded with countless posts reporting the same malfunction, creating an unmistakable wave of complaints that no one could possibly overlook.

The absence of such widespread reports strongly indicates that the issue is not a general, system-wide problem with iOS 27 or later, but rather something specific to the individual device, its configuration, installed apps, settings, hardware, or another interacting factor.

In short: iOS 27 or later may be a coincidence in timing, but there is no basis to conclude that iOS itself triggered the problem simply because the issue appeared after the update.

See what each update does: About iOS 27 Updates, About iOS 26 Updates, About iOS 18 Updates, About iOS 17 Updates, About iOS 16 Updates, About iOS 15 Updates, About iOS 14 Updates, About iOS 13 Updates, About iOS 12 Updates, and so on...