Recently, the United States, Connecticut, Maine and Rhode Island recently enacted ban, to ban the use of mercury in button batteries, the scope of the ban's effective date, and is also different.

The State of Connecticut to prohibit the use of mercury button batteries have been revised regulations, the ban was July 1, 2011 to take effect. Legislation contains two exemptions: (1) provides for the automatic insulin to patients in medical equipment mercury batteries, the date of the exemption until January 1, 2015; (2) mercury present in the silver oxide battery, the exemption date to July 1, 2012.

Maine ban from January 1, 2012 entered into force, but only for specific types of button batteries: (1) zinc-air button batteries; (2) alkaline button batteries; (3) The name of 357,364,371 , 377,395, SR44W, SR621SW, SR626SW, SR920SW or SR927SW silver oxide button batteries. In addition, from January 2, 2015, all silver oxide button batteries will prohibit the use of mercury.

Rhode Island prohibits propaganda for the purpose of sale or distribution of mercury-added button batteries and button batteries containing mercury containing consumer products, but allows the use of silver oxide button cells containing the cut-off date January 1, 2012 days.

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