What safety precautions should I follow when using the CMCE040 soldering iron?

Always work in a well-ventilated area because fumes from flux are toxic, and never leave the tool unattended — remove the battery pack and allow it to completely cool before storing. Keep the soldering iron away from all flammable materials, and always return the soldering iron to its protective pen holder on the base to avoid burns. This tool is recommended for indoor use only. (Page 6)