This new cell phone concept by designer Tao Ma looks pretty sexy. It not only cuts cost and weight, but it also boosts battery life by getting rid of the display or touch screen completely. Instead, all functions and displays use LEDs below the translucent surface.
For instance, while in phone mode, the keypad would be displayed. Other arrangements of lights and shapes are displayed during gaming, SMS and other modes, depending on what you are doing. It accomplishes this thanks to a net of touch sensors behind the keys. The concept relies on two AAA batteries recharged via USB.