QuantumScape (QS) is a company focused on developing solid-state lithium-metal batteries for electric vehicles. Unlike traditional lithium-ion batteries that use a liquid electrolyte, QuantumScape aims to use a solid-state electrolyte, which they believe will offer significant advantages such as higher energy density, faster charging times, and improved safety. While their technology is promising and backed by significant investment from companies like Volkswagen, QuantumScape is still in the pre-revenue stage, and the commercial viability and scalability of their technology remain to be proven. The stock is considered highly speculative and volatile, driven by progress reports on their technology development and future market potential.