Any CO2 laser that can be powered by a Tesla battery is not going to be very effective. If you want to blind people, sure that will work, but you can do that with a handheld visible diode-based laser too. CO2 lasers aren't effective on metals unless they are over 500 Watts and will require focusing lenses and some gas assist to make the cutting work better. They do well on acrylic and some wood species, but they are far from death rays.