Originally posted by FeldmanSkitzoid
Also, I was wondering if there would be any way to focus the beam so it's just a single point of light. I'd like to be able to use it as a laser pointer when the blade is screwed off. I figure that some sort of lens would do it.
There is no way to do that, as the only type of light that can be a point at any distance is a real laser! The keychain is a bright-as-hell diode that emits plain light.
If they figured out a way to make plain light stay focused to one radius at any distance, they wouldn't need lasers anymore. (Actually, they did figure out a way -- the laser.
You only see red lasers in laser pointers because other colors are too expensive.)