JBL says its solar-powered headphones deliver 'unlimited' listening
 

Wireless headphones are perpetually hamstrung by their batteries. They only last a few hours on a charge, and you're sapping energy from the electrical grid every time you top them up. JBL believes it has an alternative, though, and it's asking for y...

https://www.engadget.com/2019/12/16/...ed-headphones/