My HP laptop is shutting down a few minutes after unplugging charger

[lili6]

Hello.

1. Despite plugging in the charger 24/7, the battery icon never shows 100% full. It stops between 90-95% available.
2. There's this problem where despite no power fluctuation, or voltage issues, the battery "charging" symbol keeps showing on and off, the battery charging also keeps going on and off, it shows with my screen going dull/bright every few minutes. I've tried charging it in many different places, but it keeps happening everywhere.
3. When I unplug my charger, the laptop has been shutting down after such less time. Initially, it began with shutting down after 40 minutes of unplugging, and now it's come down to 10-15 minutes. This is despite the battery symbol showing more than 50 % battery.
4. I have stopped getting the "battery is low" notification, which used to appear twice on screen, once around 20% battery and another around 10%. (sorry I forgot exact figures)
5. The glowing button on the left side near the battery pin socket is glowing white (meaning full batter), even though the battery is never full.

I have had my laptop for over 3 years, so I think the problem is the battery.

Should I replace it?
Thank you in advance.

[Lil_Boy_Blue]

Hi
First:- Turn off the computer, press and hold the PWR button for 4 seconds.

Then - Leave only keyboard and mouse connected, disconnect all externally connected
devices such as Docking Station, USB storage devices, displays, and printers.
Unplug the AC adapter from the computer.

Next - Press and Hold the Power button for 15 seconds to Hard Reset.
Rinse and Repeat; Re-Connect the AC adapter.

NOW begin checking/testing/proving the Hardware is fit for purpose.
Power on your PC, press ESC (repeatedly), then F2 at the prompt.
Choose System Tests (Fast Test does a 4 minute hardware check).
AND/OR
HOW DO I USE DIAGNOSTICS?

HP PC Hardware Diagnostics Windows is a Windows-based utility that allows you to run diagnostic tests to determine if the computer hardware is functioning properly. The tool runs within the Windows operating system in order to diagnose hardware failures. HP PC Hardware Diagnostics Windows comes pre-installed on new HP computers, but if not on yours, download here:-
https://www8.hp.com/us/en/campaigns/hpsupportassistant/pc-diags.html

[lili6]

Thanks so much for the advice, however, the issue is still persisting even after doing that. Thanks so much for the reply though.

[Lil_Boy_Blue]

Hi

So you ran the diagnostic and all the Hardware, Battery specifically, PASSED?

If so it may be a software or firmware problem.

[lili6]

It said that the battery passed. I think its most likely software or firmware problem, as you said. I have also done some research and it can also be an overheating issue. Do you think that it might be an overheating issue? 

[Lil_Boy_Blue · Accepted solution]

Hi

Yes overheating is an issue, either the fan casing is blocked with dust or a temperature sensor is faulty.

https://support.hp.com/us-en/document/c00292159

https://www.howtogeek.com/howto/windows-vista/ever-wonder-what-temperature-your-cpu-is-running-at/

[Lil_Boy_Blue]

Prego.