I think something about a charging cabinet, or no charging at night, is going to be involved.
The last cruise ship that I was on would unplug any chargers you leave unattended. No unattended charging allowed.
I’ve decided to ditch my lights and cameras. Not many of my pics are any better than what’s already on the net. If I want to see a pic of a grouper, I can just google it. My luggage is lighter, and my diving is more fun now.