Thanks for getting in contact with us, I’m happy to answer your question regarding our USB3-HUB7-81X and charging devices.
Unfortunately, USB hubs are not chargers and are not designed to be stand-alone chargers. If you attempt to create this type of setup, you will likely be disappointed in the performance. In addition, not all devices will recognize an unconnected hub as a charger. For a more depth explanation about why this is the case, I would encourage you to take a look at our Charging Adapter product description (http://plugable.com/products/usb-mc1). If you want to create a charging station, I would advise you to look for a product that is marketed solely as a charging device.
As far as Plugable products are concerned, if you are looking to charge multiple devices I would suggest you use the power adapters that come with the devices and something like our Plugable 12 Outlet Power Surge Protector (http://plugable.com/products/ps12-usb2).
Please let me know if you have any other questions.