This is some more background into the technicals of this invention/project:

In terms of building a working lightsaber, the two main limiting factors are beam confinement and high energy density storage. With the amazing Li-Ion batteries that the scientists/engineers have developed, stupidly powerful handheld lasers can be built, just like this one here. The issue then becomes confinement, which doesn’t look possible any time soon with a device like this. Oh well, my attempt is still bright and light things on fire!!

My device uses a Nichia GaN laser diode, which was overdriven to 7W of output by running it at 4.6A with a couple high efficiency buck drivers in parallel. An anti-reflective coated glass lens focuses the beam, and the whole device is powered by two unprotected 18650 batteries in series.

We hope you like this one and check back for more laser awesomeness as he plans to do more videos this year.