FirstSing FS27049 iPower Case with Built-In Rechargeable Li-Ion Battery for iPhone 3G/3G S
* Pass-Through USB: Charge and sync your iPhone 3G & 3G S to iTunes without removing it from the iPower via the included USB cable
* Charging: You can use the included USB cable to charge the iPower and iPhone simultaneously or just charge the iPower.
* Intelligent Power Distribution: Smart Battery Technology instructs the iPhone to always drain out the iPower first. When you're done with the iPower, simply detach it and you still have a fully charged iPhone.
* Safety First: The iPower utilizes advanced rechargeable lithium-polymer battery cell technology for added safety. Built-in circuitry prevents the iPower from shorting
* LED Battery Status Indicator: The integrated LED status indicator tells you how much power is left in your iPower. Simply press the test button and it will tell you how much power is left.
* Capacity : 1020mAh
* Compatible: iPhone/3G/3Gs
* Max Input: 5.5V
* Output: 5.0±0.2V
* Cell Type: Lithium Batteries
* Color: Blue inside, black outside
* CE
* Material:ABS+PC