The fifth edition of the Battery Innovation Days (BID) will take place on 2-3 December 2025 in Graz, Austria and online. The event is a unique 2-day hybrid experience designed to spark conversations on the latest developments in the European R&I Battery domain among the research community, policymakers, industry players and end-users to boost battery research and innovation in Europe. BID aims to increase knowledge and encourage exchange around the deployment of cutting-edge technologies in battery materials, cell design, manufacturing and recycling.