I forgot the power adapter for my HP notebook and needed to charge it. I tried it with the charger of my mobile phone which has a 5V 2.4A output.
Yet, my laptop does not load at all:
In English (translated with deepl.com):
The PC is not charging. Use the recommended charging cable and cord and ensure that it is plugged in directly.
In German:
USB
Der PC wird nicht aufgeladen. Verwenden Sie das empfohlene Ladekabel und -kabel, und achten darauf, dass es direkt eingesteckt ist.
And when I try to restart from hibernation mode or restart, the BIOS says that I need a 60W adapter but that the device is just 20W (which is wrong, but it is the guess of the BIOS).