Lithium batteries started an avalanche of innovation when they became widely available, largely because they could hold significantly more energy by weight than other contemporary chemistries. CATL says it "can achieve mass production of condensed battery in a short period of time," and indeed, it expects to put an automotive-grade version of this battery into mass production before the end of the year – although we don't know what kind of specific energy figure we can expect from that. We've seen plenty of next-gen battery technologies promising huge density figures over the last five or more years, but far fewer that make it through to the product stage