Proporta has introduced its new TurboCharger Back Pack case for the iPhone 4. The TurboCharger Back Pack is a hybrid battery/case, featuring a built-in 1700 mAh rechargeable battery pack, a microUSB port for charging, pass-through openings for the speaker and microphone, open access to all ports and controls save for the dock connector, an LED battery status indicator, and a two-piece slide-on design. Proporta’s TurboCharger Back Pack for…
