It’s no secret that we like to post fun laser videos, from homemade lightsabers to remote control robots equipped with attached lasers and the like.  Here is another video and this home experimenter boasts one of the most powerful lasers anywhere outside of a lab.  Here is an intro from the narrator:

Designed with short range power in mind, this laser uses 3 x 9mm 445nm arranged in a knife edge array. Diode collimation optics are AR coated glass aspheric, focus is adjustable via zoom type 4xintegral beam expander. Also features full time active cooling to help tame the 6+ amps of current which the diodes consume. As of Sept. 2013, the worlds most powerful handheld laser in a visible wavelength.

Let’s watch this thing in action in the video on the next page

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