How is the laser on the 3700L powered? Support April 07, 2021 14:58 Updated The laser is powered by 3 AA batteries. Related articles What is the maximum OPM (orbits per minute) of the pad while running, for RO sander models 332, 333, 333VS and 334? What is the motor diameter of the Porter Cable 7815 router? What causes the sander to shake violently? Is there a wait time between shots? Where is the Porter Cable PXRA2676 Restorer sold? Comments 0 comments Please sign in to leave a comment.