Found a nice solution to charge my laptop with a USB-C charger even though its USB-C doesn't support charging. Minus 0.75 kg from the luggage weight, score! (more in the comments) :
USB c pdから4.0x1.35mmプラグアダプター100wタイプc asus zenbook ux21a ux31aux32a ux32v ux32vd用の急速充電磁気ケーブルコード
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