The prototypes on display at Ceatec Japan 2004 show that fuel cells could become a widely adopted supplementary power source to conventional lithium ion batteries, and could start replacing them in some applications after 2007, according to developers.
As well as showing its
prototype fuel cell for PDAs that it announced last December, Hitachi also unveiled a prototype laptop PC fuel cell and a fuel cell-based battery recharger for mobile phones, both of which will be available in 2006, according to the company.
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