Well, It's time to replace my LCD screen in my laptop ..again........ So I was like what the heck let's burn some holes in it with a laser! The DragonLasers.com 1W Blue Laser is tough and it's survived many bumps and drops over the year+ time of owning it! It's certainly the toughest laser I've ever owned and the duty cycle seems to be only limited to how much pain from heat your hands can take! I would recomend to everyone else to use their own judgement regarding duty cycle not mine!