“It is generally accepted that used alkaline batteries can be placed in the trash. U.S. alkaline batteries have eliminated the addition of mercury since 1995.”

(My husband recommends taping the positive end to avoid electrical transmission, potentially leading to a fire under unusual circumstances.)

BUT: “Rechargeable batteries contain toxic, heavy metals such as Nicke-Cadmium, Lithium, and Mercury and should not be placed in the trash.” The publication says that there are free drop-off boxes at various locations.

So consumers must be informed and, again, motivated to dispose of these toxic materials properly.