- Messages
- 83
If you look at water clocks they run on tap water. You refill them every couple of months.
From an Amazon description of such a clock:
A classic ECO clock, powered by water and available in five colours. Accurate, Environmentally friendly, Easy to use, and powered by water. A high quality clock that runs itself! Running 100% on natural power, without batteries, chemicals or anything other than water and a dash of lemon juice. Fill it up for more than six weeks of timekeeping. With its contemporary design, its ideal for use at home or in the office and ideal as a gift. Measures 10cm x 8.5cm (approx.).
How Stuff Works
This clock runs off a simple galvanic cell battery, which entails the emersion of a cathode or positive metal (such as copper) and an anode or negative metal (such as zinc) in an electrolyte solution. The lemon-laced water serves as the electrolyte solution, which allows the transfer of electrons between the two metals, resulting in an electric cell.