Have you ever wanted to charge your iPhone without having it make a noise when you plug it in? If you have a roommate, wife, or kids, you will know how valuable it can be to charge your phone at night without beeping or buzzing noises.
The solution is quick and simple. Swipe left on the lock screen to access the camera and then plug in the Lightning cable. No chimes or buzzing. You can then press the home button to return back to the lock screen.
This method also works if the phone is unlocked. Just open the Camera app, attach the Lightning cable, and then close the Camera app.