Check out this portable power station for your 3G iPhone.

The Portable power station features a built in iPhone dock and a battery extender for your 3G iPhone.

Here’s the specs.

• On/Off button to access the secondary battery when on, off use iPhone battery.
• 90 degree flip as Docking for iPhone
• Connect the charge cable to charge the iPhone and secondary battery simultaneously.
• Light indicator show the working process. Light on for using the secondary battery and charge the iPhone. Light off for using iPhone battery only without charging.Red indicator means charging the battery. Silicone Case included.
• Input Voltage: DC5V ~ 5.5V
• Input Capacity: Max. 1.8A
• Output Voltage: DC5.1V ~ 5.5V
• Output Capacity: Max. 1.2A
• Capacity: 2200mAh
• Li-Polymer
• Weight: 95g

The 3G iPhone Portable power station is available to buy online for $38.00 from Brando.