WP3 WP3 Advanced battery ageing and performance modelling: D3.1 Multiscale high-fidelity modelling paradigm for physical testing virtualization.D3.2 Reduced-order model development and validation.D3.3 Data-driven model development and validation for virtualization of performance and ageing testing.D3.4 Physical testing report for model validation and characterization. WP1 - Specifications, requirements and use cases definition Link WP2 - Design of Experiments, boundary conditions and methodologies. Link WP3 - Advanced battery ageing and performance modelling Link WP4 -Battery safety and reliability AI-powered toolchain Link WP5 - Digital Twins for Hybrid Test in Battery Development Link WP6 - Development of hybrid testing platform Link WP7 - Dissemination, Exploitation and Communication Link WP8 - Coordination and Management Link