Batteries are marked with the symbol of a crossed out garbage can (see below). This symbol indicates that batteries must not be disposed of with household waste. Batteries that contain more than 0.0005 percent mercury, more than 0.002 percent cadmium or more than 0.004 percent lead contain the chemical name of the pollutant used under the garbage can symbol - "Cd" stands for cadmium, "Pb "stands for lead, and" Hg "for mercury.