Here were some of the possible ways of getting this done...digging some of my basic physics knowledge here...
- Generate power for your laptop from key strokes - We spend some energy for very key stroke! (Remember Newton's law?? - Every action has an equal and opposite reaction!)
- Generate power from the heat expelled by your laptop's battery and the other hardware
- Use the screen's brightness to regenerate power
- Use sound from an MP3 song to generate power
- Use ambient light to generate power