of making your gadget greener by using sustainable energy, something the solar that means sweden is taking to the next level. this machine is printing custom ink onto solar panels and they don't even need the sun to charge. we and they don't even need the sun to charge.— sun to charge. we have developed _ sun to charge. we have developed our - sun to charge. we have developed our own i sun to charge. we have i developed our own incentive in this machine reprint that ink. how is the usage different to other solar cells? you could harvest both ends of light. it's artificial solar photosynthesis. any kind of light. your sort of using electricity but electricity using anyway. you'll agree a recycling light. the extra efficiency means that those silver strips that usually run through panels are no longer needed, freeing up new design ideas. these cells have been shaped to fit a headphone and