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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 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?

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marked as duplicate by GAThrawn, Al E. Sep 7 '11 at 12:40

This question was marked as an exact duplicate of an existing question.

The most concise answer from that other question "The Samsung Galaxy Tab has a loading current of 2A, but the USB-Specificication only allows about 400mA (or was it 500mA?) at the whole bus." So, Tablets have bigger screens and bigger batteries, need to be given more power than average phones, and the USB spec only allows a PC to give out a (relatively) small current for USB charging. – GAThrawn Sep 7 '11 at 12:31
Actually I just noticed that the tables IS slowly charged from the USB, even though the battery status+icon say that it's not. Also, the linked question refers to the previous generation tab, not the Honeycomb one, so I thought that things might've changed since the devices have fairly little in common. – onik Sep 7 '11 at 18:30
Some explanations of what is going on can be found at… – Florian F Apr 10 '15 at 12:18

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.

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This is not true for all Honeycomb tablets. IMHO many of them are able to charge the battery with an standard USB cable. – Flow Aug 15 '12 at 9:14

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