Geekido

Yesterday I tried to use an unpowered USB hub in my 2010 Prius, so see if I could charge two iPhones at once.

Nope! It did not like the hub. In fact, it seemed to disable the port, for when I removed the hub, I still couldn’t connect a single iPhone with a single cable. Power cycling the car cleared the disabled port, but I never got the hub to work. I reproduced the behavior for several trials.