Is it okay to hear a slight popping noise when I plug my charger into the port of my scooter. All scooters can to this and it's perfectly normal when plugging into the battery. It's the current being connected. Related articles What is the weight limit on your scooters? Why isn't there a port cover over my charging port? What do I see inside my charging port? How do I set my Nanrobot Scooter up after receiving it? Nanrobot D6+ Manual Comments 0 comments Please sign in to leave a comment.