mophie today announced the immediate availability of Juice Pack Air, an Apple-certified ultraslim external battery for iPhone 3G. The rechargeable 1200 mAH battery, integrated into an ultra-thin case, is now available worldwide at Apple retail stores and Apple.com for $79.95 in black, white, and purple.

Juice Pack Air features an innovative “standby mode” that allows users to control when they want to take advantage of additional battery support versus simply using it as a protective case. The integrated 4 LED charge status indicates how much power is remaining in the external battery. Unique pass-through design allows users to simultaneously charge their Juice Pack Air and sync their iPhone 3G with iTunes via the included USB cable.

Additional battery time provided by Juice Pack Air:

* 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 hour
* Video Playback: Up to 6 hours

[via iphonebuzz]