Gomadic High Capacity Rechargeable External Battery Pack suitable for the Apple iPhone 3GS - Portable Charger with TipExchange Technology

• Integrated circuitry tailors output voltage and charging current to exact specification of the Apple iPhone 3GS (accurate to 0.1v).
• Very easy to operate. Simply connect Apple iPhone 3GS, press activation button on pack, and charging begins. Quick start guide included.
• Specification: Internal Battery (7800mAh lithium polymer), Input port (microUSB), Output Port (Standard USB), Onboard Circuit Design (Apple iPhone 3GS Specific), Dimensions (2.75 X 3.25 X 0.75 inches), TipExchange enabled (Yes)
• Built with high capacity lithium polymer rechargeable battery technology (28 Wh / 7800 mAh) in a compact design.
• Designed with a front facing LED display that clearly display the current battery capacity at the touch of a button

No more scoping out airport waiting rooms for AC plugs. No more sweating in the parking lot waiting for your Apple iPhone 3GS to charge. Keep the family plugged in on camping trips or the office wondering how you are always so utterly available. Small, Lightweight and extremely durable, the Gomadic High Capacity Battery Pack for the Apple iPhone 3GS is the perfect addition to any nomads road arsenal. Whether you need an extra boost to squeeze some extra hours out of the Apple iPhone 3GS or you are resurrecting it from the dead, the High Capacity Battery keeps you mobile, agile and free. Consider yourself an independent and free-moving provider of energy!