[another Power thread] What is BC1.2? Do I need it?

[allfox]

I'm looking for a USB hub which could powering Pi herself and act as a hub.

My eyes on this: http://www.amazon.co.uk/ORICO-UCHA-20W- ... uctDetails

This hub is more expensive than a normal one, I notice that it meets a standard named BC1.2, so it could offer more currency.

I read some threads who told me Pi's USB power port can not talk anything to hub, so I should find a hub which just offer 1A or more currency without any "negotiation". Is a BC1.2 hub able to do that

[BMS Doug]

I'm looking for a USB hub which could powering Pi herself and act as a hub.

My eyes on this: http://www.amazon.co.uk/ORICO-UCHA-20W- ... uctDetails

This hub is more expensive than a normal one, I notice that it meets a standard named BC1.2, so it could offer more currency.

I read some threads who told me Pi's USB power port can not talk anything to hub, so I should find a hub which just offer 1A or more currency without any "negotiation". Is a BC1.2 hub able to do that

Yes. a BC1.2 hub can supply 1.5A.
Ummm, not sure now, reading the specification PDF seems to indicate that the hub will determine how much to allow, so negotiation is probably present...