External battery for iPhone 4

In the new catalog we USBFever Mill, a fourth case for iPhone that allows you to reload the device mobility.

The case is very slim, considering that also mounts an internal battery, since it is only 18 mm thick, and protects the entire back and side 4 of the iPhone, freeing space for access to hardware buttons and inputs.

  Once inserted, the iPhone can reload it using the built-in 1600mAh battery, which provides additional 6 hours of talk time, 36 hours of audio playback and 10 hours of video.The price is $ 150.