ZenFone 9 suddenly shut down as if “out of battery” while have lots of battery remaining

[Sasarei]

1. Model Name: ZenFone 9 (AI2202)
2. Firmware Version: WW_34.0304.2004.145
3. Rooted or not: Not
4. Frequency of Occurrence: Frequently

===============================

My ZenFone 9 suddenly shutting down due to “out of battery” whenever in use (moving in home page, tethering hotspot, opening setting, opening application, etc.) and it cannot boot despite there are still a lot of remaining battery left.

Once plugged into a charger, the screen will turn on and indicating there are still remaining power (exactly the same with the last remaining power before forced to shutting down). It can continue to be functioning as long it is plugged.

However, the charging behavior also become weird as the charging status would read as “connected but not charging”. The charging status keep alternating between “on” and “off” (sometimes increasing percentage, but mostly just stuck).

If its not plugged to the charger regardless the remaining battery power, it will suddenly be shutting down again and the cycle repeat as above-mentioned.

The Battery Care displaying the battery in good condition and good charging habits, and I’m pretty sure I never made any changes to the battery setting whatsoever.

I’ve upload my General Log in googledrive  but im not sure if i can post the link directly here (exported right after the last shut down earlier today, while the screenshot made just now ).

Thanks in advance.

thi

[harrison1988 · Accepted solution]

Replace the battery and see if that resolves the shutting down issue as it only shuts down when it's on battery. Sounds like a faulty battery controller misreporting to the system. 

[Sasarei]

Thanks for the reply.

I actually just dropped my phone to the service center yesterday and according to them it is indeed a faulty battery.

I’m just curious if it was software issues since I didn’t saw any visible physical abnormality with the battery, but yeah upon further inspection by the technician there is indeed a very small bulge in the battery. Therefore, although it is not accurately reported in the controller system as “faulty” but it needs to be changed asap. I guess the Battery Care and other battery system app (Ampere) I was using to check the battery health were not accurate enough, or maybe because it just free app lol.

Anyway, thanks again for your time, cheers.

[harrison1988]

Oh, very interesting regarding it being slightly swollen. Do you charge it for extended periods of time? 

Glad that they found the fault and were able to rectify it.