Using the DeWalt DCF809C1 Impact Driver is a breeze. First, make sure the battery is fully charged. Insert the battery into the driver until it clicks into place. To use the driver, hold the handle firmly and press the variable - speed trigger. You can adjust the speed according to the task at hand. For delicate work, use a lower speed. For tougher jobs, go for a higher speed. When working in dark areas, the 3 LED lights will automatically light up to give you a clear view.
As for safety, always wear safety goggles to protect your eyes from debris. Don't use the driver in wet or damp conditions. Also, keep your fingers away from the rotating bit.
For maintenance, after each use, wipe down the driver with a clean, dry cloth. If the driver gets dirty, you can use a mild soap and water solution, but make sure it's completely dry before using it again. Check the battery regularly. If it starts to show signs of wear or doesn't hold a charge well, it might be time to replace it. Store the driver in the provided bag in a cool, dry place to keep it in good condition.