1. I have no idea which hub is "better" other than the Plugable has been doing its job flawlessly for coming up on 3 years.
2. From the data in reference post #3 I do not see why not, but I charge then use in two systems, then recharge every night.
3. The Plugable can provide up to 1.5 amp current to qualified devices, ones that meet that spec I think it is QC1?? the reason I suggested the Hub is because many laptops do not have enough amperage on their usb ports to supply 1 amp, which is recommended for the Mojo Many usb ports are setup to be capped at 500ma. Depends on the laptop, obviously, although many usb 3 ports could provide the power. I suspect you just need to try your particular one, prior to springing for a hub.
But be aware, the more stuff you have connected to usb ports in your computer the more noise you may introduce into the bus and may eventually affect the ultimate SQ of the Mojo. In both my setups there is nothing else on the usb bus.