Enough Outlets
With the exception of only the absolute newest cruise ships (we're talking those that debuted in 2014 or later), cruise ship cabins are well known for not having enough outlet space for all the gadgets and devices most cruisers carry with them on board. You are likely to find a couple throughout the room. And you might be able to unplug a lamp to get more sockets. Though if you have at least two phones in the room, plus a tablet, a game console, a battery pack, and a laptop, there will just not be enough space to charge all of them.