Water Powered Calculator
Made from biodegradable plastic this innovative water powered calculator designed by H2O is a great eco alternative addition to the office desk and the school bag.
Simply add water to the fuel cell to activate power and start doing the sums without ever requiring replacement batteries.
When the water evaporates so will the power so simply top up with more water again. This only needs to be done around every 3 to 6 months.
The calculator is limited to 8 digits for calculation purposes! All most of us need in the current economic climate!