The subject is a quote from latest issue of Scientific American magazine. And from the context it talks about plastics/polymers. So it is about battery made without use of metals, like lithium/lead/nickel etc... So it is not about li-poly, which is obviously longer on a market then few years, nevermind few months. But I could not find what author actually referring to: search results are all about li-poly. Would really be interested in reading more about it. Could someone figure out what he is talking about? Bigger quote: Once the potential of polymers as conductors had been demonstrated, the idea took off. In 1977 the first conducting polymer was synthesized; in 1981 the first battery with polymer electrodes was demonstrated. Last summer conducting polymers matched the conductivity of copper, and a few months ago the first rechargeable polymer battery was put on the market.