To extend your iPhone battery
If there is anything that annoys more cell phone users, it loses battery power while you're on the phone. This led to almost all success, and taken at least once there completely by surprise. If you have a cell phone as powerful as the iPhone, it is easy to see why the battery begins to discharge. If you hear your favorite song, your e-mail and text messages to friends simultaneously, it takes a lot of power in mobile telephony. "So begins the life of the phone battery faster than you thought, drain.