As far as I know this model doesn't have batteries. Mine looks exactly the same and it runs off 12-volts from the coach batteries, supposedly hot all the time. Look in the hinge area of your door and see if you see two spring-loaded plungers and mating contact areas. That is how power is passed to the lock assembly, it happens only when the door is closed or very close to it.
You may have blown a fuse, usually very near the batteries themselves, or you could be unlucky like me and have (another) bad keypad. My coach is at the dealer right now getting the fourth keypad installed! The first one was recalled because it could catch fire, the second had two 3 buttons go dead two weeks after installation, and the third shorted out and tries to lock the deadbolt whenever the above-mentioned contacts come together. Had to isolate them with electric tape so I could close the door.
Good luck and let us know what you find.
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