Using your DeWalt DCD798D1 is easy. First, make sure the battery is fully charged using the provided charger. Insert the battery into the drill. For drilling in concrete or masonry, switch to hammer mode. This will give you up to 28,050 BPMs for efficient drilling. When using the drill mode, you can expect up to 1,650 RPMs with no load. The on - tool LED work light will help you see what you're doing, especially in dimly lit areas. Remember to wear safety goggles and gloves when operating the drill. After use, remove the battery and store it in a cool, dry place. Keep the drill clean by wiping it down with a dry cloth. If the chuck gets dirty, you can clean it with a small brush. This will help keep your drill in top condition and ready for your next project.