Earlier quoted context omitted.
The title is full of hype.
The title is factually accurate, as no other solid-state battery has as high a capacity. Perhaps it could be better phrased to be clearer that it's "the highest of solid state batteries" and not "the highest of batteries, and also solid state".
But that's the problem with these announcements. They make one or two factual statements that seem positive but hide the downsides. A year or two from now and the downsides aren't overcome and at best they gain a small market niche.