H20-Powered Calculator.

Appliances, Gadgets, Gifts, Human Interest, Reasonably Priced, Tools, Useful Things 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.

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Comments (2)

2 replies on “H20-Powered Calculator.”

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.

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