Laptop shuts down when I start it while unplugged but not if I unplug it after it has booted

[Umbeka]

Hi everyone, I'm dealing with a strange issue that I haven't been able to resolve. When I power up my laptop while it's unplugged, it shuts down after about a minute. However, if I boot it up while it's plugged in and then unplug it, this doesn't happen, and I can use the laptop on battery power without any issues. So far, I've tried cleaning the cooling fans, reapplying thermal paste, and updating the BIOS, but none of these steps solved the problem. I've searched online for solutions, but most results address laptops shutting down as soon as they're unplugged-not this specific scenario.

I'm out of ideas and would appreciate any advice or suggestions. Thanks! 

[BeemerBiker]

I am guessing the laptop thinks the battery is below the minimum power threshold and after booting up it notices the problem and shut down

Please run  a battery calibration?

An energy report might be useful.

Energy Report	A list of possible problems ranked as Errors, Warnings, or Informational

These report are obtained by using the Administrators command prompt.
Copy and paste the following into the command prompt window for the energy report.

powercfg /energy .\energy-report.html

Note the number of errors and warnings.