Yes.
Some models of Casio calculators have solar charging capabilities. The calculator has a built-in solar panel that converts sunlight into electricity for use by the calculator. The advantage of this design is that there is no need to replace the battery. As long as used under appropriate lighting conditions, the solar panel can convert light energy into electrical energy to power the calculator. This charging method is environmentally friendly and economical, and also allows users to use the calculator outdoors or without power.