Electronic parts supplier FDK Corp. has developed one of the industry's thinnest disposable lithium batteries.
The square-shaped battery measures 0.42mm thick and 25mm on a side. It boasts a life of five years -- much longer than the two to three years of existing models. It will be marketed for use in such products as security cards.
The Fujitsu Ltd. affiliate will invest about 300 million yen to set up production lines at a Tottori Prefecture factory bought from Sanyo Electric Co. Mass production is slated to begin in September, with sales expected to reach 500 million yen by March 2012.
Slimming down existing button-shaped batteries is difficult. The new product solves the problem by using thin-film materials, opening the way for the development of bank security cards that issue different passcodes with each use.
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