Sooo much wrong with his story. How did the battery become “detached” and how can it be assumed it belongs to a luxury vehicle if they don’t know the make/model of the vehicle it came from?
Whatever happened to "who, what, where, when, how, why?"
Not certain, but “Detached” probably means unconnected to a charging source. As the numbers of such cars increase, parked in crowded public garages say at airports and hospitals, and similar “accidents” are bound to occur. Guns don’t generally go off spontaneously but people still try to sue the manufacturers. All the companies producing and pushing these cars are far more logical targets for some juicy lawsuits.