The days of being frustrated by your remote control running out of batteries may be coming to an end. Your controller may soon be powered by the very action of you pressing the buttons. It combines circuits that use less energy with a power generating function from the vibrations of the user pushing the button.
"The remote control was realized by combining (1) a vibration-based power generation device developed by Soundpower, (2) NEC Electronics' microcomputer supporting RF remote controls that use radio waves with a frequency band ranging from several tens of MHz to several GHz to transmit and receive data and (3) a power supply control technology that drives electronic circuits with a small amount of electricity.
Specifically, electricity is generated by utilizing the weak vibration caused by pressing a button on the remote control. The electronic circuits of the remote control are driven by the electricity to turn on and off a TV set, adjust the sound volume and switch channels."