Why would you want to have a controller off of that port? I thought PS4 controllers paired with the console via BlueTooth. I see there's a hub for the slim but I'd advise against using non branded(non genuine) parts of that console.
Hi. They are wired controllers, not wireless. They do not need recharging, no batteries are built into the controllers, they are powered from the usb port.
The ps4 slim has 2 usb ports, i am using one for an external hard drive, so only have one free usb port. Would like to use two controllers for co-op. games