SOLSOL has created a solar charging hat. The brim of the hat contains little solar panels, so that as you wear it, it will charge your phone or tablet. Charger not included, but no batteries needed.

https://odditymall.com/solsol-solar-charging-hat?fbclid=IwAR3F6dfAroOiiAvwtkFkI-7u1gEB3kOtOwOGIWKpYYARrhO2TqRshuprsmM