We currently have a scooter we rented from Deckert Surgical. The dropped it off at our hotel (GC) at bell services so it was there when we checked in. They pick it up from bell services on the day you return it.
We have used One Stop Mobility many times, never a bad experience. Once one of the scooters was having issues and they replaced it pretty quick. They will also price match if you find a lower price somewhere else. Wonderful service and it was great to have these for the trip. They will drop off at the hotel or you can pickup from a location they have right across the street.
When we were at DLR this past summer, our hotel handled the whole thing for us. They got the scooter and each night they charged it up for us in their lobby and had it ready in the morning. We stayed at the Castle. You should inquire if your hotel will do this for you.