Using the Milwaukee 2105 penlight is a breeze. First, insert the two included AAA batteries. Then, you can turn it on using the on/off or momentary - on button. For quick access, use the metal clip to attach it to your pocket. When doing two - handed tasks, you can use the rubber bite zone to hold and direct the light. Remember, the penlight is waterproof and dustproof, but don't submerge it for an extended time. As for maintenance, if the light starts to dim, replace the batteries. The body and lens are impact and corrosion - resistant, but try to avoid dropping it or exposing it to harsh chemicals. This penlight comes with a limited lifetime warranty, but batteries aren't covered, so keep that in mind.
