Scientists in the United States have made recent advances in solid-state battery technology, which promise major increases in electric car performance. Solid-state batteries, which use solid electrolytes rather than liquid ones, provide greater stability and energy capacity. Stanford University researchers have invented a lithium metal battery that has the potential to double the range of electric vehicles, allowing them to travel 500 to 700 miles on a single charge. Furthermore, collaborations between automakers and startups, such as Mercedes-Benz's partnership with Factorial to create the Solstice solid-state battery, seek to enhance EV ranges by around 80%, with an energy density of 450 watt-hours per kilogram. These advancements address critical obstacles in EV adoption, such as range anxiety and charging efficiency, paving the door for more dependable and long-lasting batteries.