The automotive industry's shift to electrification has increased CO2 emissions during the production phase, requiring manufacturers to optimize the entire vehicle lifecycle. The EU battery passport regulation, effective in 2027, introduces reporting requirements for electric and industrial batteries over 2kWh, promoting transparency and sustainability. Digital battery passports provide detailed lifecycle data, revolutionizing battery management. However, challenges like data traceability, integration, and compliance persist. This presentation explores the regulation's application, best practices for CO2 reduction, and real-world insights from battery production environments.