On May 5, 2025, the twinBATT Cluster hosted its first joint webinar, uniting four Horizon Europe projects—DigiBatt, FASTEST, THOR, and AccCellBaT—to explore cutting-edge advancements in battery testing and development. Project coordinators shared their latest progress, including innovations in digital twins, smart algorithms, and fast-track testing platforms. This event marked the beginning of a collaborative journey to accelerate sustainable battery innovation through digitalization, virtualization, and joint outreach. FASTEST Project is co-funded by the European Union under grant agreement N° 101103755 and by UKRI under grant agreement No. 10078013, respectively. Views and opinions expressed are however those of the author(s) only and do not necessarily reflect those of the European Union or the European Climate, Infrastructure and Environment Executive Agency (CINEA). Neither the European Union nor CINEA can be held responsible for them.