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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