Generate your own electricity
In the Kitchen EcoMaster, CASO Design has come up with battery-less kitchen scales. Using the scales is as easy as pie: before you begin weighing, you turn the energy wheel to generate the requisite electricity (it works basically like a dynamo with a storage function). The effort you expend is transformed into electrical power, so no batteries are needed.
In other respects, the Kitchen EcoMaster works like normal scales, offering a display, useful features such as a tare function, and a choice of measurement units (grams, ounces etc.). After use, the EcoMaster switches off automatically and can be stored in the cupboard, where it takes up very little space.