Maine Bans Button Batteries Containing PBDE and Mercury. The Governor of Maine has signed two bills restricting the use of deca-PBDE (a flame retardant) and mercury in button batteries. Challenge: Effective January 1, 2010, no one may manufacture, sell, supply for sale, distribute, or use television or computer products in Maine with a plastic casing containing more than 0.1% deca-PBDE. Exemptions: 1. Used products; 2. Products where PBDE was originally present in recycled materials; or 3. Products manufactured before January 1, 2006, and replacement parts containing penta-bromodiphenyl ether or octa-bromodiphenyl ether. The requirements for mercury-containing button batteries are now more stringent: From June 30, 2011, no one may sell, supply, distribute, or provide for promotional purposes the following mercury-containing button batteries, or products containing any of the following mercury-containing button batteries: 1. Zinc-air button batteries; 2. Alkali-manganese button batteries; or 3. Silver oxide button batteries with the markings SR357, SR364, SR371, SR377, or SR395. Furthermore, after January 1, 2015, no one may sell, offer for sale, or provide for promotional purposes mercury-containing silver oxide button batteries, or any products using such batteries. - Reference source: Hong Kong Trade Development Council (HKTDC) 2009-06-10