I tried everything I could think of. I updated my Mac to macOS Tahoe. I tried running the OTA normally, this doesn’t work and it shows the same error. I had to use the DFU mode it get it back to 18.5 using Configurator. I did also try installing iOS 26 via Finder and Configurator but same low battery screen pops up. Everyone needs to report this on Feedback so they know about this. Also if you’re having issues getting it to DFU, you have to use the included USB C to C cable in the box when you plug it into your Mac, I also found that a Samsung SSD Cord works the best with this, oddly enough.