Please note the error after the iOS 26 update I updated to the beta version of iOS 26, but the phone did not charge more than one percent and it reboots every couple of minutes when charging. In the settings, the maximum battery capacity says 0% the phone did not fall before the update, everything was fine, I updated it and this stuff started Even the recovery can't be done because it restarts in the middle of the process.
I have exactly the same problem with the iPhone 13 Pro 128gb. I have a replaced battery, and when I installed this update, the battery status shows 0% in the settings, and the phone does not charge more than 1%, although before installing the update it was 100%, please solve this problem
This is likely a bug, so you should raise it here: https://feedbackassistant.apple.com/ and post the FB number here.
In the meantime, have you put your phones into DFU mode? That should bypass any battery management issues that might be caused by iOS 26 beta, and allow you to restore.
I have the same problem with the iPhone 12.
Same problem on IPhone 12 FB18079209