These products should be used completely, given to some one who can use them, or saved for a community hazardous waste collection. 6 - Dry cell batteries used for such things as portable radios and remote controls often contain mercury or cadmium. Never throw batteries in the trash. They should be saved for a community hazardous waste collection. 7 - Automobile and other equipment batteries often contain lead and sulfuric acid.
Improper disposal can create an environmental hazard.
Dead batteries should be recycled.