Fuel cell chargers like the Medis 24/7 power pack aren’t rechargable. The chargers contain a finite amount of chemical fuel that provides power for electronic devices through fuel cell technology: hydrogen in the form of a metal hydride reacts with oxygen in the air to form water and heat, and an electric current as a by-product. Once the metal hydride is exhausted, the charger can be recycled by sending it back to the company.
The technology behind these chargers will probably be refined, but for now the charger provides 30 to 60 hours of additional power for cell phones, iPods, etc., with a price tag of about $25.00.
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