Check out this geeky water-powered calculator. It uses three water batteries for power that have two electrodes inside made from a special alloy which, when immersed in water, produce electricity ...

Add a few drops of plain tap water to the removable battery and insert it in the gadget for up to three months of use. Leslie Katz led a team that explored the intersection of tech and culture, plus ...

Check out this cool green gadget, the water powered calculator. Plain tap water powers this unique, H20 desk calculator! Add a few drops of water to the removable battery and insert it in the ...