Experience using a 3rd party GaN PD 3.1 charger?

Has anyone had experience using a 3rd party GaN PD 3.1 charger like https://www.amazon.com/Charger-Aftertop-QC22-5W-Charging-Station/dp/B0B3MJ5PYF/ref=sr_1_6?keywords=1... - could it supply sufficient power for performance tasks without draining the battery?

What about "regular" tasks like online web browser tabs open and downloading, or watching videos - will these "regular" tasks drain the battery if the laptop is plugged into Dell's included 130W power supply or the  PD 3.1 140W power supply (link above)?

Thanks in advance for your sharing.