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Illinois bans older type of hearing aid batteries

Published: Sunday, July 7, 2013 5:30 a.m. CDT

BELLEVILLE – The tiny button-shaped batteries that have been powering hearing aids since the late 1970s have long been known to be harmful to the environment because of their mercury content. Now, they’re illegal, as improving technology enables Illinois and several other states to ban them.

Mercury was removed from alkaline batteries in the mid-1990s, but the popular zinc-air button batteries in hearing aids were allowed to stay on the market because until recently manufacturers could not come up with a mercury-free alternative. An Illinois law signed a year ago took effect on Monday, and supporters say it could help reduce environmental contamination and the risk to public health from exposure to the toxin, which can cause organ damage.

“Mercury doesn’t break down,” explained Kevin Greene of the Illinois Environmental Protection Agency. “... If mercury gets into a water body, it can be converted into a more toxic form.”

Mercury that builds up in the body can damage the brain, kidneys and central nervous system.

“People are exposed to mercury most when they eat food contaminated with mercury, especially fish,” Greene told the Belleville News-Democrat.

The new types of batteries are made without mercury and function almost as well, the newspaper reported. They are made by familiar companies like Duracell and Energizer, but some mercury-containing zinc-air batteries remain on the market.

The Illinois law makes it illegal to sell or distribute the older type.

The ban will “further lead to protecting human health and the environment,” said state Sen. Martin Sandoval, the Chicago Democrat who filed the legislation.

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Information from: Belleville News-Democrat, http://www.bnd.com

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