Powered by butane, the Portasol ProPiezo 75 Professional Soldering Iron, No. PP-1K, is portable and cordless. This soldering iron features an ultrasonically welded gas tank for better strength, safety and reliability. One container of butane will run this soldering iron for more than 90 minutes, and provides 15W to 75W. The tool is constructed with butane-compatible plastics to prevent the gas from leaking. The short distance from the tip to the grip allows the technician closer access to the work surface, says the company.