CHECK THE CHARGING CORD!

My sister used to grab my mothers by the cord and YANK it out of the charger hole, or the wall socket. it busted the head of the charger plug on the scooter itself. So ALWAYS use your hand to gently rock the charger plug off the scooter. If this person wasnt careful and used the cord as a yanking tool, it can cause damage.

Maybe your MD will write the "occasional use" rx for the scooter, if you tell him how you are using it.