"Lithium button cell (sometimes called coin cell) batteries are everywhere, from car key fobs to . And while they seem innocent enough, if ingested, they can cause severe injury from esophageal or airway damage in less than two hours, which can, in the worst cases, result in death. Each year in the US alone, some 3,500 button cells are swallowed, mostly by children."
"For a few years now, several button cell manufacturers have been coating their batteries in Bitrex, a harmless chemical compound that's the most bitter substance known. A thimbleful in an Olympic-sized swimming pool can make all the water bitter. This substance is added to a wide array of products to prevent ingestion, from bleach and antifreeze to Nintendo game cards."
Lithium button cell batteries are common in many small devices and can cause severe esophageal or airway damage if swallowed, sometimes within two hours, and may be fatal. Approximately 3,500 button cells are swallowed in the US each year, mostly by children. Manufacturers have implemented safety measures including applying Bitrex, an extremely bitter but harmless compound, and using hard-to-open packaging to reduce accidental ingestion. Energizer's Color Alert line adds a food-grade marker dye to batteries to make it easier to spot if a battery has been in someone's mouth. The Color Alert line covers common button cell sizes.
Read at ZDNET
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