The Juice Pack Air promises to double your iPhone 3G’s runtime, as well as offering the protection of a hard case.  Despite that, it’s only 0.75-inches thick, and adds just 20-percent more weight.  Check out our review of the Mophie Juice Pack Air here.

To enter, and stand a chance of winning a Juice Pack Air worth $79.99, leave a comment in this post telling us about the time you drained your iPhone 3G’s battery the quickest.  We’ll pick one comment at random after the closing date – May 18th at 12pm central time – and that person will take away a Mophie Juice Pack Air!  If you want more chances to win, we’re also giving them away at SlashGear and PhoneMag.

Terms and Conditions

Competition is open to residents of the US over the age of 18.  Family members of Mophie and R3 Media are not permitted to enter.  Competition entries are only accepted via the specified comments section; entries left in the comments of any other post will not be recognized.  Entries should be submitted before 12pm central time on May 18th; one entry per person.

The winner will be announced on this site and contacted via email; they will be expected to respond within 48 hours else their prize may be forfeit and another winner selected.  Editors decision is final and no correspondence will be entered into.  Winner agrees that their name and details of their entry may be used for promotional purposes by, but not limited to, R3 Media.  Prize consists of a one Mophie Juice Pack Air.  There is no cash alternative.

That standby mode means the iPhone 3G can be left in the case, but reserve battery power kept back for when a user knows they’ll specifically need it.  An included USB cable and sync-through technology means the Mophie Juice Pack Air will both recharge itself and synchronize/charge the iPhone without requiring its removal from the case. 

• 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

The Mophie Juice Pack  Air is available in Apple stores and from Apple.com online worldwide, priced at $79.95.  Black, white and purple color options are on offer; you can also buy the battery-case direct from Mophie themselves.

Press Release:

Mophie Announces Worldwide Availability of Juice Pack Air Accessory at Apple Stores and Apple.com

World’s Thinnest ‘Works with iPhone’ External Battery/Protective Case almost doubles iPhone 3G battery life and offers the full protection of a hard-shell case in a low-profile design

Los Angeles, CA., – April 21, 2009 – mStation | mophie today announced the immediate availability of Juice Pack Air, currently the world’s thinnest Apple-certified 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.

“Since debuting the Juice Pack Air last month, we’ve had an overwhelmingly positive response from around the world” says Ross Howe, sales and product development director for mStation | mophie. “The Juice Pack Air is an intuitive, ergonomic solution that provides added protection and external battery support in a low profile design. We think it’s poised to be one of the most essential iPhone 3G accessories ever introduced to the market.”

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:
o Standby Time: Up to 270 hours
o Talk Time: Up to 4.5 hours (3G) Up to 9 hours (2G)
o Internet Use: Up to 4.5 hours (3G) Up to 5.4 Hours (Wi-Fi)
o Audio Playback: Up to 20 hours
o Video Playback: Up to 6 hours

For more information on the Juice Pack Air, please visit http://www.mophie.com/products/juice-pack-
air