Used in lead-acid batteries for automobiles and backup power systems due to its ability to store and deliver electrical energy efficiently. Common in radiation shielding for medical and nuclear applications because of its high density and effectiveness in blocking X-rays and gamma rays. Employed in the production of solder and alloys, especially in electronics and plumbing. Historically used in paints and pigments, though this application has been largely discontinued due to toxicity concerns. Still found in some industrial processes such as cable sheathing and vibration damping in machinery.