How to change the battery of electronic door lock in star hotel?

I'm the lock of the visa hotel. This mainly depends on the model of the lock. Some are in decorative baffles, and some are in locks behind doors. If it is the first case, remove the decorative baffle, there is a battery box inside. Just take it off and replace it with batteries. In the latter case, remove the rear lock body plate of the door and replace the battery in the way just mentioned.