
A small solar battery would work; I have some calculators from the 1980's that are still working. How many of you have a solar calculator that is still around and still working very well?
"Solar powered calculators are hand-held electronic calculators powered by photovoltaic panels mounted on the device. They were introduced at the end of the 1970s"
Could I create a solar powered tablet to write on that would last as long as these devices?
Kindle has the screen for that?
I feel good this morning; I have been printing out our coloring book for my daughter who will try to sell or show the book this holiday season.
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