QuantumScape is getting closer to commercializing its solid-state EV battery technology, and the market could be huge.2025 has been a good year for QuantumScape (QS 3.24%) stock. Shares have soared about 140% as the electric vehicle (EV) battery company has made progress with its next-generation solid-state technology. The stock had been doing much better before November, though. The stock is now over 30% off its recent highs, following a 33.4% drop in November, according to data provided by S&P Global Mark ...