Rank #19
Use a solar-powered charger for electronics.
This solar-powered charger is a great way to keep your electronics powered up without having to worry about plugging into an outlet. It uses the power of the sun to charge your devices, making it a great eco-friendly option. It's perfect for camping trips, long car rides,
From Wikipedia
A solar-powered watch or light-powered watch is a watch that is powered, entirely or partially, by solar power using solar cell technology.