Chosen Solution
Hello, i have a question. I run an repair shop and i repaired like dozens of phones. i recently refurbished my own iphone 8 plus device to make it look new.. but now my phone is overheating entirly but at the power button it is even warmer. the phone also lose 1% every minute when using it. -housing replaced original batteryOem screen
Bad Tristar chip on the motherboard. Microsoldering required to repair it.
Did you try a new battery? Also go into your settings go to battery and than battery health. If its below 82%, I recommend a new battery anyways.
