[citation][nom]derek2006[/nom]Madgoat the beam is going to be 20nm to hit up a very small area. You probably will not notice an increased power draw, think about it man. Hakesterman, you need to realize they are manufacturing it to work with heat, again just think about it.[/citation]
... 20nm is essentially the color of the beam. It has nothing to do with power consumption at all. It means it's blue, nearly ultraviolet. The power comes in terms of wattage. A pen laser is typically rated at 5mw, that's a decently bright beam, but not at all hot. If you increase it to 50nm, it can hurt within a few inches. 100mw, and it'll light stuff on fire, given enough time. To heat the disk at 10,000 rpm, it'll have to be very powerful, depending on how hot it needs to get. I'm thinking in the 250mw to 400mw range, though I'm no expert. Maybe it'll heat it up through several rounds of spin or something... I dunno. Either way, that's a significant draw on a battery. You get a good 10-20 minutes out of two AA batteries with the 5 mw lasers... do the math if you care to.