Actually, I used to work at a local Walmart, and the biggest problem is they don't have enough, except for overnight, they can never charge long enough, maybe one will charge for 15 minutes before another customer needs it.
@calicuz even the fully charged ones in the morning can wear down quickly when a really heavy person gets on them. There is a weight limit on a sticker on them but some people are probably 100 pounds or a lot more over the limit.
@nedkelly it is and I saw one customer not quite that big but very large, was young like in her 30’s, one leg had been amputated and the other turning black on the bottom part. Every month she would be in her handicap scooter buying sweets, junk foods and soft drinks. Had them in plastic grocery bags tied all over the scooter. Would come back the rest of the month to get what she ran out of.