I hope that has a clue about you and can help me. My car battery is empty after 2-3 days. If I briefly solve the minuspole after driving and connect again it stops for several weeks. I would like to know what you think of the explanation. The battery has been changed by ATU. Chat GPT has delivered me the following. Yes, the Norauto car battery 41 (70Ah, 650A) can cause problems with the battery management (BMS) of your Citroën Spacetourer 1.5 BlueHDi xl. Here are the possible hen Impact: 1. Problems with the battery management system (BMS) • The Citroën Spacetourer (from 2018) has a self-learning BMS, which expects a battery with at least 720-800A CCA. • Since the Norauto battery has only 650A CCA, the BMS could classify the battery as weak, even if it works technically. • This can lead to misinterpretations of the charging state, for example: 2. Possible symptoms ? ECO mode remains active immediately ? The system disabled St type-stop to save the battery. ? Battery does not charge completely ? The BMS could not recognize the battery properly and stop the charging process early. ? Rest current problems ? If the BMS considers the battery to be weak, it can keep consumers unnecessarily in readiness, which can lead to faster discharge. ? Start problems in cold weather ? Especially in winter the lower CCA can lead to difficulties in starting. 3. Can the BMS adapt? • The Spacetourer has a self-learning system, but: • The battery must provide the right parameters for the charging process. • A battery with too low cold start current (650A instead of 720-800A) may never be recognized as “fully charged”. • The BMS can learn, but a too weak battery cannot become “stronger”. 4. Conclusion – Can there be problems? Yes, there may be problems as your Citroën expects a battery with higher start current. • In the short term, it can work, but the battery can be nte wear out earlier and start stop could be permanently disabled. • In the long term, unexpected discharges, loading problems or error codes can occur in the BMS.