No clue tbh....I would imagine in the restaurants you could prob find an outlet somewhere. If no one else has an answer for you I will check next month when I go to see if I can find one.
Ik there isn't like a charging station for it or anything around parks but I would think they got some plugs layin around so they can clean floors, vacuum etc.
If you can afford a new battery though it would be smarter/easier to just carry a spare.