Windows laptop turns off when unplugged
It should be noted that the battery usually degrades over some time and the change is noticeable. If the battery became dysfunctional instantly, it is possible that the issue is with the settings of the system, connections, or laptop hardware, and maybe even the battery itself. A good test could be to plug the battery of a similar laptop and check if it works with the other device. In case you are facing this issue, please proceed with the following troubleshooting.
Laptop not working when unplugged
1] Change Advanced power settings
At times, when a system is forced to shut down without following the appropriate process (e.g. pulling out the battery), the laptops Power Management settings get altered. We could fix it as follows: Press Win + R to open the Run window and type the command powercfg.cpl. Press Enter to open the Power Options window. Click on Change plan settings for the current plan in use.
On the next window, select Change advanced power settings.
In the next window, expand Processor power management > Maximum processor state.
Change the value for On battery mode to 25%. After this, enable Adaptive brightness. Shut down the system and try booting it with the power cord unplugged.
2] Run the Power Troubleshooter
The Power Troubleshooter checks for problems with the power settings of the laptop and resolves them if possible. To run the Power troubleshooter in Windows 11, click on Start and go to Settings > System > Troubleshoot.
Select and run the Power Troubleshooter from the list. To run the Power troubleshooter in Windows 10, click on Start and go to Settings > Updates and Security > Troubleshoot.
Select and run the Power Troubleshooter from the list. Restart the system and check if it solves your problem.
3] Hard/Power reset your laptop
A hard reset of a laptop resets the hardware settings but does not affect any personal data. The procedure for a hard/power reset is as follows: Check if it works, else proceed to the next solution.
4] Update the battery drivers
The issue in discussion could be caused if the battery drivers are outdated. In such a case, we could update the battery drivers as follows: Press Win + R to open the Run window and type the command devmgmt.msc. Press Enter to open the Device Manager window. Expand the list of battery drivers. Right-click and update the one for your battery. Restart the system once done.
5] Update the BIOS
Sometimes, the problem could be that the BIOS is obsolete. This affects the chipset and subsequently, the communication between the battery and laptop. Thus, you could update the BIOS as follows: If nothing helps, if your battery is old, then maybe the battery is dead and you may need to replace it. Hope something here helps you. Read next: Windows 10 laptop Battery charging slowly or not charging.
