Duracells new myGrid mobile USB charger is a great little device for anyone looking to juice up anything powered by a USB connection. Its capable of storing enough juice to provide smartphones with 4 hours, MP3 players with 30 hours, and ebook readers with 100 hours of extra juice.
The pocket sized deveice can also be powered directly from a USB cable is needed but looks more at home being poweed wirelessly on top of the Duracell Wireless myGrid charger. Its now available to purchase from stores for $35.
More information is available from the Duracell website.