A designer by the name of Wu Jian has come up with a concept for an eco-friendly battery gadget. The Soft Solar Battery is made of several layers of film, including a flexible battery and flexible solar panel. The battery is rolled out flat to charge up in the sun, the level of charge indicated by the small display on the panel.
When you wish to use the flexible battery, you simply roll up the film into a cylinder to use within conventional devices that need a battery. It’s an interesting concept, but I image the film will degrade/peel very quickly. Technical specifications have not been provided, so I get the impression this is merely a concept.
I think that high capacity rechargeable batteries are the (near-term) future, but simply using standardised charging devices as a power source. I don’t think that the Soft Solar Battery is a practical eco-friendly energy source.
Source: Red Dot