There are plenty of emergency battery chargers around on the market at the moment but this one is something a bit special as it comes with a huge 9,900 mAh capacity, which means over fifty hours of movie playback time for the iPhone and iPod Touch, less for the iPad and other tablets etc!
These are the features and specs for the iGeek Large Capacity Portable Charger;
Ultra reliable lithium ion battery with 9900 maH capacity at 5v output voltage
Will easily give you over a week of battery boosts for your device (with normal use)
1 amp & 2 amp ports, charge two devices at the same time!
50 hours of movie time for iPhone, iPod touch or 17 hours movie time for iPad 2
iPhone (3G, 3GS, 4, 4S)
iPod Touch, Nano, Classic
Other Stuff (Kindle, Nintendo DS, Sony PSP, and many more – Standard USB charging cable required)
Retractable USB cable included
No iPhone/iPad adapter is included because it works with the one you already have
Rubberized black finish
Batteries: Lithium ion (plug in to recharge)
Priced at $61.99 in the US and £40 in the UK
Source [Coolest Gadgets]