I think it will charge, but I doubt it has much capacity. I can't see any proper specs, but I'mm guessing it's no better than thi one on eBay for less than half the price:
http://www.ebay.com/itm/2400mAh-Port...item25703c7df5
I don't know how well they work. I'm curious too!
Another similar one:
http://www.ebay.com/itm/USB-Power-Ba...item416fa7b6c1