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.

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This entry was posted on Thursday, April 26th, 2007 at 12:01 am and is filed under Appliances, Gadgets, Gifts, Human Interest, Reasonably Priced, Tools, Useful Things. You can follow any responses to this entry through the RSS 2.0 feed. Responses are currently closed, but you can trackback from your own site.