I've seen this term thrown around in laptop reviews, most recently the Toshiba Kirabook. So what is the difference between a chargeable USB and a normal USB port? Does it have make limitations i.e. can only USB 3.0 ports be chargeable?
Chargeable USB ports allow you to charge devices even while the laptop is off or in sleep mode. They can be USB 2.0 or 3.0, although 3.0 will charge faster. You do need to install a driver for it to work.
Source: Google search for "Chargeable USB port" ...