Samsung showed prototypes of extremely thin flexible batteries
As we wrote before, fully flexible devices that we see mostly in futuristic concepts, not just rely on flexible displays, but a comprehensive range of flexible components, including batteries. Recently, Samsung has introduced another step in that direction. Stripe and Band thin flexible batteries which can be used in combination with the smart phone or smart watch. Band resembles watchbands and can add about 50% of the standard capacity of a typical smart watch battery.
More interesting concept is Stripe: battery in the form of tape, which is only 0.3 mm thick. As you can see in the picture, it can be wrapped around a smartphone and become almost invisible expanding battery, including part of the protective case. Samsung does not mention what specific specifications of the two components, but claims that the energy density is higher than those currently available from competitors.