So if you have the choice between a USB 2.0 and 3.2 port for charging a device, you'll always want the 3.2 port (but don't expect too much from the little guy). The only other significant ...

When you plug in, it could be a slower USB 2.0 port or it could be a faster USB 3.2 port. And it can be hard to tell which ports are which, so don’t feel too bad if you didn’t know.