can i use this HUB?

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http://androidforums.com – im just looking for a usb hub that i can plug a few different devices into for charging, not looking so much for sync capablities so its gotta be powered and able to work without being hooked up to a computer. i found this hub on ebay and it says its got 4 amps of power, will this be enough to charge my nexus s 4g and galaxytab 10.1? only other things i ever need to charge is my bluetooth keyboard which says its rated at 450ma will that be too much power for this? thanks everyone! Belkin Mobile USB Hub 7 Ports New | eBay (General)