The Android power button is among the strongest pieces of design Google has ever produced. It's merely one key tucked along the side of my mobile device. The power button does many things. I use ...

Android 16 Beta 2 adds a new 'double press power button' menu that lets you choose to launch Google Wallet instead of the camera.

Most Android phones currently support a double-tap gesture of the power button, which typically opens the system camera application.