debcook

Solar power is not new to calculator technology. However, have you heard of powering a calculator with water?

That is right – you can add, subtract, multiply and divide without using any energy except that provided by the included water battery. When the ciphering dims a quick refill with tap water brings it back. I guess you could call this a fuel cell. Fuel cells have been talked about to power automobiles but I had no idea that there were already these tiny ones that I could buy right now.

When my solar power calculator gives up the fight I think I will buy one of these. They are very reasonably priced – some under $10.00 on Amazon. They look the same as most other calculators but they have a cool hidden secret. What a unique gift a water calculator (sometimes called an H2O powered calculator) would make. No learning curve is involved so people of all ages could use it. I bet most of them would not already have one.