Comment by poly_morphis

Yes, the battery needs coding to tell the car about its capacity, battery type, etc. to optimize the charging. Fortunately coding modules is not completely locked behind dealer-only tools (see VCDS https://www.ross-tech.com/vag-com/VCDS.php), but it is very inconvenient for the non-enthusiast who probably doesn't want to spend $200 on a tool to code their battery.