powered usb hub

I recently bought a TP-Link UH700 which seems pretty good so far (it is only powering 3 USB2 controllers at the minute so I have hardly really stressed it).

There is another model with an extra pair of rapid charging ports too.
 
Thank everyon, please explain have I got this wrong, I was looking for hubs powered from the main, can I get one powered via a usb charger (like a phone charger) ?
 
Thank everyon, please explain have I got this wrong, I was looking for hubs powered from the main, can I get one powered via a usb charger (like a phone charger) ?
Every powered hub I have seen is powered via a barrel jack. I assume this is a combinarion of avoiding support confusion over:
- What provides the power and what handles the data
- Generic USB chargers cap out around 10W (6V 2a without special protocols) whereas hubs like the UH700 take a 12V supply to give 30+ Watts
 
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