you can of course own or import almost anything in europe. if it is marked with ce, it can easily be imported through customs. when you start something it can be a different story, but also often problem-free as long as nobody bothers you. if others are affected, it can be problematic and you pay a fine. Examples: the owner of the airfield notices that the voltage is higher. or the owner of the house sees a charger in the basement with too high a charging voltage. or at a traffic control, the police officer sees a battery with high voltage and without UN approval. If you have an accident and someone is injured, it will be bad for the owner of high-voltage batteries if they are not tested. it is particularly bad if you do not indicate how high the voltage is. example. a car has an accident and a 100 volt battery is simply transported in the trunk. If the accident is investigated and it turns out that the voltage is not marked or warnings are visible, the judge will be very strict. because it is also endangered by zb. rescue, fire brigade and all helpers. many are unaware of this and think very selfishly. you often see it on e.scooters that are operated illegally.
the large logistic centers in europe have almost all x-ray machines. if large batteries are detected, these packs are opened and checked by experts when they are imported into the eu. there was recently a case where batteries for oneweels were discovered without CE-Dokuments and UN 38.3 approval. The goods are then confiscated and destroyed. the importuer pays the costs and the penalty.