We all need a calculator now and again, most of which contain replaceable batteries or are disposable. As I have said before there is no such thing as disposable, so here is my calculator solution, a H2O’s Water Powered Business Calculator.
To maintain a constant supply of energy simply refill as the water evaporates, they say typically every 2-3 months. The H20 water-powered battery is eco-friendly and all the components of the calculator are recyclable.
I haven’t tried this yet, I will update when I do, to whether it rocks or not
Water powered is fresh.