Using the DeWalt DCL183 flashlight is simple. First, charge the flashlight using the included USB cable and a 5VDC 3A power supply (you'll need to get the power supply separately). Once charged, turn it on to start lighting up your work area. You can use the strong magnet or hook to attach it to a metal surface or hang it up, so you can work without holding it. When carrying it around, use the belt clip for easy portability. As for maintenance, keep it clean and dry. Since it has an IP54 rating, it can handle some dust and water, but don't submerge it in water. If it gets dirty, you can wipe it with a dry cloth. Also, when not in use for a long time, make sure to charge the battery every few months to keep it in good condition.