Dexim offers the P-Flip Foldable Power Dock, the world’s first foldable, portable, multi-functional and rechargeable power dock for the iPhone and iPod touch. The Power Dock is basically an …

Here is a 3-in-1 external battery pack that adds DUAL SIM function to the iPhone 3G/3GS. The battery pack includes the Q-Dual Dual SIM card adapter that allows your iPhone 3G/3GS to use two SIMs. Users can easily switch between the two SIMs on the iPhone.

iPWR introduces the SuperPack external battery for iPhone 3G mobile phone. This compact SuperPack has a 1800mAh Lithium-Polymer battery inside that can double the operation time of your iPhone 3G. It can change the iPhone from 0% to 100% in under 2.5 hours.

mophie has previously introduced the Juice Pack external battery, the company now offers the ultra slim Juice Pack air rechargeable external battery for iPhone 3G. Based on a rechargeable 1200 mAH lithium polymer battery, Juice Pack air has an ultra-thin, light-weight, low-profile design and is the thinnest Apple certified “Works With iPhone” external battery in the world.

SolLight offers the SOLiCharger, a soloar-powered rechargeable backup battery for iPhone and iPod touch. The SOLiCharger is a small lightweight Lithium-ion battery pack that can be charged from solar power. It offer iPhone or iPod touch up to …

PhoneSuit introduces the MiLi, another power pack for iPhone. The MiLi works with both iPhone 2G and iPhone 3G. It has a 1800 mAh battery offering:

Standby time = 350 Hours
Talk time …

This is S-ZWT01, a portable hybrid solar charger for mobile gadgets. The S-ZWT01 has solar panel that charges and maintain the built-in 2000 mah Lithium ion battery. It supports most mobile gadgets thanks to the bundled adapter …

Incase offers this Power Slider battery case for the iPhone 3G. Like Mophie’s Juice Pack, the Power Slider offers expanded battery life for your iPhone, but this Slider delivers more by …

FastMac releases the iV extended battery and portable charger for iPhone, both 2G and 3G. FastMac iV offers up to 24 hours of talk time, 750 hours of standby time and up to 21 Hours …

The battery life of the iPhone 3G is not enough for you? Consider Mophie Juice Pack for iPhone 3G, a external battery pack. The Juice Pack 3G is a rechargeable lithium polymer battery in the form of a non-slip, soft grip case.

The Juice Pack offers up to 350 hours of standby time, up to 6 hours of of talk time and internet use for iPhone 3G, up to 28 hours of audio playback and 8 hours of video playback time.