But it only offers that at I think 20 V, which my phone can’t take
This is actually a big part of many of the high speed charging standards that phones use, is it will actually charge at a higher voltage to lower the amperage. I don’t know off the top of my head if USB-PD does this on phones but I know the old Qualcomm Quick Charge standard did it a lot. I think it went as high as 24V if I remember correctly
Then of course for a while lots of phones supported competing standards of quick charging and nobody allowed anyone else to use the same branding so identifying compatible chargers for your phone’s specific type of quick charge was a royal pain in the butt
This is actually a big part of many of the high speed charging standards that phones use, is it will actually charge at a higher voltage to lower the amperage. I don’t know off the top of my head if USB-PD does this on phones but I know the old Qualcomm Quick Charge standard did it a lot. I think it went as high as 24V if I remember correctly
Then of course for a while lots of phones supported competing standards of quick charging and nobody allowed anyone else to use the same branding so identifying compatible chargers for your phone’s specific type of quick charge was a royal pain in the butt