Many supporters of solid-state batteries describe them as a breakthrough, but Toyota, a pioneer in the technology, says they will co-exist with other battery types for years to come. TOKYO-SHIMOYAMA, Japan – Supporters of solid-state batteries have described them as a breakthrough that will sharply increase electric vehicle range and efficiency, but Toyota, the world’s best-selling automaker, says that the technology is just part of a multipath approach to increasing EV adoption. Read more: