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H20-Powered Calculator.

by Chris Coyier

Nigel's Eco Store is selling a 12-digit desktop calculator that runs on water-based batteries.
"Powered by the revolutionary H20 water battery - this patented technology utilizes two electrodes made of special alloys, when immersed in water the resulting chemical reaction produces electricity."
I didn't even know such wizardry existed. Apparently when the battery runs out you can just refill it with water. Each fill will last it 2-3 months and the battery has a lifespan of at least 2 years. The calculator costs £14.99 (~$30), but it doesn't look like they ship to any non-European countries. VISIT SITE

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2 Responses to “H20-Powered Calculator.”

  1. Sara Says:

    Yes, it is simple chemical reaction. It isn’t much, but an efficient calculator is definitely a good app for that. I used to make potatoes run clocks and other such small things based on differences between electrodes. The water is part of the reaction that creates the flow of electrons.

  2. links for 2007-04-29 « Richard@Home Says:

    […] FreshArrival » Blog Archive » H20-Powered Calculator. “Powered by the revolutionary H20 water battery – this patented technology utilizes two electrodes made of special alloys, when immersed in water the resulting chemical reaction produces electricity.” (tags: battery water eco green goodidea) […]