Is this safe? For T480. I know USB-C negotiates from 5V to 20V gradually in steps, so idk if sudden 20V like this from adapter would kill it. I have many portable 45W chargers so I was thinking it would be cheaper to just get an adapter for €4 rather than buy ...
Lenovo ThinkPad P51 Mobile Workstation Review
USB-C 65W AC Adapter fit for lenovo Yoga C930 S730 920 730 ThinkPad X1 Carbon 5th 6th ThinkPad T480 T480S P51 - Newegg.ca