I have the HP 13" envy 360, I also wanted to do the same because i did not want to carry a bulky charger when i travel. I bought a 87w 20v usb-c generic charger with usb-c to usb-c cable off "Ali Express" for less than £17. It charged it up to 100% and no smoke came out so that is a good sign eh! ..... It also has a usb 3 port so when travelling I can charge both phone and laptop together. Just got to get a flight post Corvid 19.
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