Do you remember hydrolysis science experimental during your school days before? Lets bring back that memory because this calculator is totally powered by hydrolysis system as a power supply called Hydro Powered Calculator. This system consist from two electrodes made from special alloys that will react with water and produce electricity. Three water tubes that will represent each power cell can supply enough electricity for the calculator about two or three month before the water fully evaporates.

The dimension measures approximately 2" x 5.25" x 3. With green color theme and transparent casing, it makes this calculator eco friendly and even providing free energy.

[Via Perpetual Kid]