Have you thought about solar-powered power banks? These little devices help to eliminate the worry of needing an outlet to charge your devices. They are ideal for sports, hiking, camping ...

Solar-powered generators—also called portable ... and headphones charged, but I’ve used power banks to heat water in an electric kettle, grind coffee, and power my laptop during remote work ...

but it also incorporates SolarCity - a solar panel firm which specialises in efficiently storing large amounts of electricity in power banks. The company says it has powered small islands ...