Comment on Why are laptop adapters so much larger than phone adapters of same power rating?
rtxn@lemmy.world 2 weeks agoUSB Power Delivery over a regular USB-C-compliant cable delivers a variable current of up to 3A, using discrete voltages of 5V for up to 15W of power, 9V for up to 27W, 12V for up to 48W, and 20V for up to 60W.
Higher powers require dedicated USB PD-compliant cables that can handle up to 240W at a voltage of 48V.