Using the Milwaukee M12 FUEL 5/8 SDS Plus Rotary Hammer Kit is quite straightforward. First, charge the 12V 4.0 Ah Lithium - Ion battery fully using the provided charger. Once charged, insert the battery into the rotary hammer. You can choose between the rotary hammer mode for drilling in concrete and masonry or the rotation - only mode for other tasks. When using it, make sure to hold the tool firmly. The LED light will help you see the work surface clearly. For maintenance, after each use, clean the tool with a dry cloth. Store the tool and battery in a cool, dry place. Don't expose the battery to extreme temperatures. And remember, the tool has a 5 - year warranty and the battery has a 3 - year warranty, so if you have any issues, you're covered.