Can I charge Samsung Galaxy Tab 10.1 from USB? Possible Duplicate:
  Galaxy Tab is not being charged through USB Cable  




I can't charge Samsung Galaxy Tab 10.1 from my USB. Is this a malfunction or intended behaviour?

I know that the mains charger supplies four times the power of a single USB port, but I'd assume the tab can at least be maintained if not charged with the 500&nbsp;mA of USB.

However, when the tab is plugged in, I see a red cross over the battery icon and the phone status screen says "Discharging".



How do I fix it?
There's no way to charge a Honeycomb tablet by USB, sadly.

Update: Most tablets can't be charged by USB, but some can be charged by USB - an example would be the Nexus 7.