There were some excellent suggestions of how to bypass the Energy-Saving card Devices that are on the cabins on the Royal Princess. Insert any type of card in the slot by the door in lieu of your cruise card so that the power does not go off when you remove your cruise card.  Drove me nuts the last time on the Royal and will be cruising again Nov 6, 16th and 26th so am prepared this time.  Search same title for original feed.