Home/Factorial unveils 40Ah all-solid-state battery cells/Factorial unveils 40Ah all-solid-state Solstice™ battery cells, using a novel dry cathode coating for higher energy density, sustainability, and scalability. (Photo: Business Wire) Factorial unveils 40Ah all-solid-state Solstice™ battery cells, using a novel dry cathode coating for higher energy density, sustainability, and scalability. (Photo: Business Wire)