From BBC News, By Nick Dauk and Will Smale Business reporters, Edited by Vinuri Randhula Silva IMAGE SOURCE, ADIDAS Image caption, Adidas and Urbanista now both make headphones that are solar powered If you are the type of person who is forever forgetting to charge your wireless headphones, help may finally be on hand. It comes as the first commercially available solar-powered headphones are now on sale. The models, by Swedish firm Urbanista and German sports giant Adidas, both have solar panels built into their headbands. In each case the flexible panels are made by another Swedish company, Exeger, which has spent the past decade working to make them light, thin and powerful enough to do the job. Exeger's boss Giovanni Fili says it is both a matter of convenience and, more importantly, doing the right thing environmentally. "Charging - everyone hates it," he says. "But every time you don't charge [using mains electricity] it is a good thing for the world. "