Solar energy is the go-to in terms of recent developments in renewable energy. Companies are clamoring to figure out ways to use the sun's rays to better power their gadgets. This watch uses solar energy on the go to power any mobile device that can be connected by USB.
Carbon is a watch made by EnergyBionics that charges phones whenever you want without even thinking about it. The watch is a literal solar panel sitting on the wrist that charges by itself as long as it's exposed to the sun. When it's charged, the user can simply plug their device into the watch and get three to four hours of charge.
The big thing is that the user doesn't have to think about charging it, the watch does it itself.