Introduction
A properly maintained Maglite flashlight can work for a long time. It can easily work for over twenty years! However, sometimes old parts breakdown and your beloved Maglite may no longer turn on. If you see moisture in the head of your Maglite, this guide is for you.
The model we will look at today is the 4D, from the late 1990s to early 2000s. This guide should also work for other D-cell battery Maglites made after the 4D model.
If you see moisture in the flashlight head, you might have a damaged O-ring. This guide will show you how to look at and replace the O-ring.
If your Maglite turns on, it should be ready to go! If your Maglite does not turn on, the next step is to look at the battery compartment. Please see another guide for this step.
