No disposable or rechargeable batteries required!

The water-powered desk-top calculator reduces your ecological footprint. It offers the normal range of basic functions. Its battery only needs topping up with water on average once a month.

Conventional batteries are full of toxic chemicals. They are a major environmental and health threat if disposed of in domestic waste and, like waste oil or medical waste, must be taken to specialist facilities. The water-powered battery and the gadgets below represent the first step on the way to safer energy storage.

Dimensions
120h x 85d x 150w mm

H2O's patented technology uses two electrodes made of special alloys which, when immersed in water, trigger a chemical reaction which generate electricity. To maintain a constant supply of energy, simply refill the battery as the water evaporates - typically every two to three months. The battery has a minimum continuous life of two years.

If you return your old battery, replacement batteries may be bought for £5 per pack of two.

Energy saving, conserving energy, water powered, H2O, H20, money saving, saving money, Tango -
H2O Water powered Home Calculator - ESTANH2OCALC