For campers, hikers, and anyone else who ventures off the beaten path and out of the world of electrical outlets, Mophie has an iPhone 4 power pack for you: The Juice Pack Plus Outdoor Edition not only keeps your phone charged and protected, its companion app also turns the iPhone into a functioning GPS receiver. And you can even share your wilderness adventures via Facebook and e-mail: your racks, waypoints, and geo-coded photos.
The app includes 5 million square miles of high-resolution maps, for the continental U.S. and Hawaii. When you buy the case you get a year's subscription; it's $29.99 a year after that.
Oh, and the Juice Pack Plus Outdoor Edition's 2000 mAh battery adds 8 hours of talk time to your iPhone. It's currently on backorder till January 24; it sells for $120.