my phone shuts down
after ios 16 update, my phone battery turns into 1 percent and shuts down almost every 5minutes eventhough whithout using or touching it. I got that important battery message 'Unknown part'. it is so frustrating. i need help. i am still waiting new update after 16.0.2, what should i do now? I never changed my battery it was okay before ios 16
iPhone 12 Pro Max, iOS 16