Cellphones do well most of the calculation needs today, but there are still many people who prefers to work on a calculator whether scientific or just normal. There is a calculator, which is powered by water; actually, it uses water or any other electrolytic solvent for power. The solvent or liquid creates a chemical reaction in the fuel cell with zinc anode and cathode produces electrical current that can power this water calculator for a month. I hope to see this kind of some cool innovations in laptops and cell phones as well and who knows they might be working on it right now.
This water powered calculator costs $19.99, and it available through computer gear's website.
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