BYD’s recent disclosure via its FinDreams Battery website marks a visible inflection point for solid-state batteries (SSBs): the technology is moving from quiet development into structured demonstration timelines and supply-chain repositioning, with distinct materials choices that diverge from other leading OEM routes. This momentum, alongside public road tests and pilot-line progress across the US, Europe, and Asia, suggests SSBs are entering early deployment while broader automotive integration is targeted later this decade.