Solid-state batteries have been hyped for a decade but still aren't production ready. In the meantime, semi-solid state batteries using gel electrolytes are quietly entering power banks and e-bikes. These cells offer better safety than traditional lithium-ion with liquid electrolytes, reducing fire risks that led to millions of recalls in 2025. Gel-based batteries sit between liquid and solid designs. They are less volatile than standard lithium-ion and easier to manufacture than true solid-state cells. For energy storage, e-bikes, and portable power, this middle ground could matter more than waiting for a perfect solid-state solution that keeps getting delayed. The article notes that Donut Lab's claimed solid-state breakthrough was debunked. While researchers continue chasing solid-state, semi-solid designs are already shipping. For decarbonization goals, deploying safer batteries now may be more practical than holding out for a technology that remains years from mass production.
