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It Must Be Green | Toys & Gifts | Water Powered Gadgets | H20 8 Digit Calculator
The H2O 8 digit water powered calculator uses the latest long life H2O technology to power this compact 8-digit calculator. Simply add water to the cell to activate, and enjoy free energy to run your calculator. Add water when required, typically every 3 to 6 months. At the end of the life of the cell usually 2 to 3 years, the cell can be replaced, and you can start over again. The calculator is made from biodegradable plastic, so is environmentally friendly and easily recycled.
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