I’ve been running my laser for well over a year. A single screw through a lip holds the battery door to the laser. Over time, this lip gets a little bend in the door moves slightly away from the battery. This caused my battery to make poor contact and get dimmer. Squeezing the battery door brightened the laser back up. Installing a new door with battery change every year or every other year is the fix for me.
Reviewed by: Brian from Arizona on 6/17/2018