Lithium batteries are currently disposed of after their use the same as regular household waste. There are no federal regulations for disposal of lithium batteries. Individual states or localities can establish their own guidelines for battery disposal, and should be contacted for any disposal guidelines that they may have.
The Lithium coin batteries used in this product contain perchlorate material. Special handling may apply in California. Go to:
https://www.dtsc.ca.gov/hazardouswaste/perchlorate for more information.