Laptops ASUS Zenbook not charging over 18%

[frozty97]

Hello guys,

I bought ASUS Zenbook on July 2022. It was working fine, mainly used by sibling for educational purposes and multimedia (Excel, netflix, youtube).
I have enabled 80% max battery charging since I got it.
Now it doesn't charge above 18%. And without the charger, it instantly shuts down (Not like waits 2-3 minutes and then, rather we are using it, unplug charger boom screen is off.)

Is this a known bug, do I need to replace the battery (not under warranty cause it's more than 1 year)?
If I need to replace what will be the cost?
And if it's a bug, what's the fix?

Thanks!

 

[shree4231]

battery is damaged, but you can try resetting BIOS, but if it doesn't do anything, might need to change the battery or use plugged in.

 

[nRiTeCh]

Check with asus diagnostic tools as each brand comes with its own set of tools to diagnose hardware else third party tools are always there..
You might need to re-calibrate the battery.

 

[enthusiast29]

Was the battery always (or most of the time) plugged in when in use?
Does it charge when it is turned off?