Everyone knows the iPhone battery doesn’t last long, so what you need is a Mophie Juice Pack, which is according to rantrave, an innovative shield which doubles the iPhone’s battery life while adding protection for the iPhone.

The Mophie Juice Pack is from Britain and is a hard shell case incorporating a lithium battery which pushes internet browsing time up to 8 hours and talk time up to 9 hours on your iPhone 3G.

The Mophie Juice Pack is available via Amazon at a price of $80 while on Mophie’s own website they price at near $100. We have a short video demo of the Mophie Juice Pack for your viewing pleasure below