Back in February, we had heard about the Mophie Juice Pack Air. Well, as of yesterday (4/21/09) the Mophie Juice Pack Air went on sale through Apple stores and Apple Stores online. The Juice Pack supposedly boosts the runtime of the iPhone 3G by nearly 100 percent. The Juice Pack feeds off the original Juice Pack as well as the 3G Juice Pack that adds protection and new standby mode.

You can leave the iPhone 3G in the case on standby mode and still save battery power. The Mophie Juice Pack Air will recharge itself and synchronize/charge the iPhone without taking it out of the case via the USB cable and synce through technology.
Below are some of the promising features of the Pack.

* Standby Time: Up to 270 hours
* Talk Time: Up to 4.5 hours (3G) Up to 9 hours (2G)
* Internet Use: Up to 4.5 hours (3G) Up to 5.4 Hours (Wi-Fi)
* Audio Playback: Up to 20 hours
* Video Playback: Up to 6 hours
You can grab the Mophie Juice Pack Air for $79.95 from Apple Stores and and the option to choose from three colors: White, Black and purple

via: Mophie Juice Pack Air arrives at Apple stores | iPhone Buzz

See More: Mophie Juice Pack Air on sale now.