iPhone 4 Battery case life extender, 2400mAh internal battery

• Internal battery doubles the run time of the iPhone 4G
• Power up and sync without removing iPhone from case.
• Built-in 2400mAh lithium polymer battery.
• Advanced battery protection technology prevents overcharging.

Product Description
This product, protects phone, insulates antenna, and recharges the iPhone 4G internal battery from rechargable battery built into case…. More >>