Recently I bought a Raspberry Pi official USB-C power supply. https://my.element14.com/raspberry-pi/sc0216/rpi-power-supply-usb-c-5-1v-3a/dp/3106944?st=usb-c%20power
It is rated at 5.1V 3A output
out of curiosity, I try use it to power up my zbook studio x360 G5. (according to http://h10032.www1.hp.com/ctg/Manual/c06040448.pdf , page 7, either of the USB type-c can be powered up with external adapter)
The test result, the raspberry pi power supply is insufficient to charge the laptop. A message pop up telling me so