I don't think you can conclude too much from it being a 9V battery. It depends how it is connected up. The shock from an implantable cardio defibrillator which

I don't think you can conclude too much from it being a 9V battery. It depends how it is connected up. The shock from an implantable cardio defibrillator which comes from a small lithium battery hurts more than 240V through your fingers.