Mophie caused a bit of a double-take by introducing not one but two rechargeable external battery cases for the iPhone 5 within a few days of each other. The Juice Pack Helium offers a sleeker body, b
<img src="http://www.crunchgear.com/wp-content/uploads/2009/02/picture-12.jpg" alt="" />Coming this spring from Mophie is the Juice Pack Air for the iPhone 3G, which is essentially the <a href="http:/