Alan Browne
Contributor
Not sure if this is fleet-wide but I was aboard the Rock Island Aggressor in Palau this May. They had an all-metal pair of open cubbies for charging. Each cubby had US-standard 120VAC receptacles.
They only allowed charging small stuff like shavers and cell phones in cabins. Stewards looked out for violations but there was nothing that would prevent charging larger stuff overnight in violation of the rules.
Perhaps a job for the "night watchman" that has been cited as allegedly missing from the Conception can look for violations?