Major sodium-ion battery milestone passed by California startup — Unigrid aces Hyundai’s safety tests down to -20C as experts call tech a 'compelling alternative' to lithium-ion

Lithium-ion batteries are one of the most successful technologies ever invented, and now span everything from smartphones to power stations — but the technology is not without its flaws and limitations, and scientists are now busy trying to figure out which type of next-gen battery will take over next.One of the big safety risks with lithium-ion...