Hi
Boyy..Thank you for your asking. Kindly try some stay-at-home troubleshooting tips below:
1. Is there any zone heating up while using/idling?
2. How long has the battery been used?
3. Enter "Safe Mode" and leave a 100%-charged phone in sleep(idle) mode in a night, then provide me the screenshot of
①Setting>Battery
②Setting>Battery>3 dots on the top"Show app usage"
# How to enter and exit "Safe Mode"
https://www.asus.com/support/FAQ/1005163/If the battery works well in "Safe Mode", please check on any disturbance from the installed 3rd party Apps.
4. Also, please try "the Factory Reset"
Settings>System>Reset options>Factory data reset
Please note that once the Factory Reset is completed, all data, apps, settings and personal information will be deleted.
For more information, please refer to the links below
https://www.asus.com/support/FAQ/1009546/https://www.asus.com/support/FAQ/1009547/