But when you use the bottom USB-C port and the USB-A port, you’re limited to just 24W of total output. And when all three ports are in use, you’ll see up to 120W of total output.

Check Power Output: Find the USB port you want to check and look at the "Power" column. This column will show you the power output of the selected USB port. Using a USB Voltmeter.

USB 3.0 stepped power output up to 5V at 0.9A, giving us a more tolerable 4.5W. Some USB 3.0 ports that are designed for charging can supply 5V at 1.5A, or up to 7.5W.

This design limits video output to a single port, excluding support for external display glasses. The Switch 2 has a second USB-C port at the top, but it's not for video output. 2.

iPhone 15 can charge at a maximum of 27 watts over the USB-C port. However ... different though with USB-C is that the iPhone can now output significantly more power to accessories.