There is an article by some scientists at this site, and the batteries will carry more current and last longer than currently used batteries. They do not have heating problems and are liquid!
quote from text: "volumetric and gravimetric energy densities exceed 50 W h l−1 and 50 W h kg−1, respectively"
That's about 1/6 of current lithium-ion. Not very useful for cars for that reason. Could be useful for other purposes.