Hacking together a USB-C charger for a cheap Chromebook
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amazing.)For
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Summary
There are a few variants, including ones with a button to select the voltage, but the most common one is a tiny board with a female USB-C connector called ZYPDS.They are so cheap that I suspect the reason the laptops don't come with them is that 1) it requires a charger that can deliver that specific voltage, and people are already confused enough by USB-C and 2) the USB-C charger side is probably more expensive.They usually support 15V/20V (selected by soldering a bridge), and while I suspect 15V would have worked too, I found one on eBay claiming 9V/12V.
As said here by Filippo Valsorda