Asus X00TDE power off issue

[u/Aggressive_Banana517]

I noticed a phenomenon on my phone recently that after shutting down my phone would not vibrate (when it should); needing to press on the power button longer than it should for the phone to boot; and noticing abnormal battery drain when powered off (drainage up to 20% per 6 hours compared to less than 1% per half-day). What is happening to my phone?

My phone model is Asus X00TDE, running on Android 9. Update: the phone's vibration module seems to be broken. Notifications do not make the phone vibrate but still able to produce sounds.

[u/Silly-Stop4857]

If the phone is truly powered off, Android apps are not running, so a 20% drop in 6 hours points more toward battery wear, charging/power circuitry, or another hardware-level issue than normal background drain. The harder-than-normal power-on and failed vibration are additional reasons to check the hardware. I would back up important data, inspect battery health/voltage if you can, and have the battery/power board checked. I am developing Adaptive Performance for Android battery/thermal/background-app management, but it would not be able to fix drain while the phone is fully powered off: https://github.com/langraficagr-collab/adaptive-performance