The laptop should support pretty much anything from 5-20V, but I would recommend using an adapter that has a bit more power. I don’t have any 15V PD sources to test with, but I did try a 12V 24W adapter, and the laptop would draw around 2A. We can pick up some 15V sources and see if we can reproduce this.
The laptop will get the maximum adapter power based on the PD sources advertised PDO, and then configure the internal buck boost charger to use these limits anywhere from 5-20V.
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