Solid-state batteries are a promising innovation in the field of electric vehicles, offering the potential for longer driving ranges and significantly faster charging times compared to traditional lithium-ion batteries. To test the real-world capabilities of this technology, the automotive manufacturer Stellantis, along with the American startup Factorial Energy, has integrated solid electrolyte cells into a Dodge Charger Daytona. This test aims to determine whether solid-state batteries can deliver on their promise of improved performance and efficiency in real driving conditions. Meanwhile, in France, the company Tiamat, which was founded by researchers from the CNRS (National Center for Scientific Research), has taken a different approach by developing sodium-ion batteries. Unlike lithium, which is a limited resource, sodium is more abundant and less expensive, making it an attractive option for more sustainable and cost-effective energy storage. Tiamat has recently equipped its first product with one of these batteries, signaling a step forward in the development of alternative battery technologies. Sodium-ion batteries are being seen as a viable alternative to lithium-ion batteries, particularly in applications where cost and resource availability are key considerations. Tiamat's progress with sodium-ion technology is expected to lead to industrial production starting in 2025, which could help reduce the environmental impact and cost of energy storage solutions for a variety of uses, including electric vehicles and renewable energy systems. Both solid-state and sodium-ion batteries represent significant advancements in battery technology, each addressing different challenges in the pursuit of more efficient and sustainable energy storage. While solid-state batteries aim to enhance performance and safety, sodium-ion batteries offer a more economical and environmentally friendly alternative. As these technologies continue to develop, they could play a crucial role in shaping the future of electric mobility and energy storage.