ACアダプターは20V出力用です。[1] [2]。
[1 [https://www.amazon.com/ghu-adapter-compatible-thinkpad-chromebook/dp/b079dnsk6w/
[2] https://www.amazon.com/jeestam-charger-thinkpad-4x20e50574-adl170nlc2a/dp/b08cvbgnfk/
The AC Adapter is for 20V output. [1] [2].
[1[ https://www.amazon.com/GHU-Adapter-Compatible-ThinkPad-Chromebook/dp/B079DNSK6W/
[2] https://www.amazon.com/Jeestam-Charger-Thinkpad-4X20E50574-ADL170NLC2A/dp/B08CVBGNFK/