Immediate action: check battery health in Settings → Battery (replace if maximum capacity reads ≤ 80% or status is "Poor"); connect a known-good charger and run adb shell dumpsys battery to verify level, health and temperature; if the device powers down again, boot into safe mode to isolate third-party apps…...

Quick action: Install the official assistive-services package from Google Play, then open Settings and search for "TalkBack", "Select to Speak" and "Switch Access"; activate each service one at a time, follow the built-in tutorial, and keep only the services you regularly operate to reduce battery and notification overhead.What the package…...