Cruise ships are a weird in-between for travel power. You're physically at sea but the ship is registered to a flag state (often Panama, Bahamas, Liberia, or Malta) and the electrical system is built to whatever the shipbuilder decided. Most modern cruise cabins have a mix of US 120 V outlets and European 220-240 V outlets, plus increasingly USB ports at the bedside.
Here's how to think about what to pack.
Cabin outlets by cruise line
The configuration in your cabin depends on the cruise line, the ship's age, and your cabin grade. General patterns:
Carnival, Royal Caribbean, NCL, Princess, Holland America
Predominantly US-style. Newer ships have:
- 2 US 120 V outlets (Type A or B) at the desk
- 1 European 220 V outlet (Type F Schuko) at the desk
- 1-2 USB-A or USB-C ports at the bedside (newer ships)
Older ships from these lines (pre-2010) may have only 1-2 US outlets total and no European or USB outlets.
MSC, Costa, AIDA (European-built, European-operated)
Predominantly European 220 V Schuko sockets, with 1-2 US 120 V outlets per cabin. If you're an American passenger on an MSC or Costa cruise, pack a US-to-Europe adapter as a safety net.
Virgin Voyages, Disney, Celebrity
Modern outlet configurations with multiple USB-C ports. Disney and Celebrity newer ships are particularly well-equipped, often 4-6 USB ports per cabin plus 2 US and 1 European outlet.
Viking, Silversea, Regent, Seabourn (luxury lines)
Cabin power is usually generous: 4+ outlets in a mix of US and European, plus dedicated USB ports. Some Viking ships have a UK Type G outlet too.
If you're booked on a specific cruise line and want to know exactly what's in your cabin, check the cruise line's FAQ page or the deck plan for your specific ship. Some lines publish cabin outlet diagrams.
What you can't bring
Almost every major cruise line bans these items in checked or carry-on luggage:
- Household power strips (unsealed, unprotected)
- Extension cords (any kind)
- Surge protectors marketed for home use
- Anything with a high-draw heating element (kettles, travel irons, hair tools above 1,000 W)
Why the bans: the maritime environment is salt-air-corrosive, ships move constantly, and cruise lines have learned through fires and incidents that consumer-grade electrical accessories don't survive well at sea. The bans are uniformly enforced at embarkation.
If you bring a banned item, the cruise line will confiscate it at boarding and return it at debarkation. You don't lose it, you just lose access to it for the cruise.
What you can bring
- Cruise-approved multi-port USB chargers (GaN multi-port chargers from Anker, Belkin, RAVPower)
- Travel power strips marketed as "cruise approved" (sealed, no surge protection)
- Standard single-plug adapters (US-to-Europe, etc.)
- USB cables (any kind)
- Power banks under 100 Wh (TSA rule applies on the embarkation flight)
A modern 4-port GaN USB-C/USB-A charger is the right answer for almost every cruise passenger. Plug it into one cabin outlet, charge phones, tablets, e-readers, headphones, and a laptop all from one source.
What to pack for a typical cruise
For a 7-day Caribbean cruise out of Miami:
- A 4-port GaN USB-C charger with US plug (handles all USB devices in the cabin)
- A USB-C to USB-C cable for your laptop
- A USB-C to Lightning cable if you have iPhones
- A 20,000 mAh power bank for excursion days (counts against airline limits, check before flying)
- Optional: a single Europlug-to-US adapter if your cabin has European 220 V outlets you want to use
For a 14-day Mediterranean cruise out of Barcelona (European-built ship):
- A 4-port GaN USB-C charger with European plug, or
- A US-style 4-port GaN charger with a US-to-Europe adapter
- The same cables and power bank as above
- A small US-to-Europe adapter for any US-only devices you brought
Shore excursion power
When you're off the ship in a port:
- US destination (Florida, US Virgin Islands): nothing extra needed
- Caribbean ports: most use US-style 120 V outlets, no adapter needed for US travelers
- Mediterranean ports: Schuko 220 V, need a US-to-Europe adapter
- Northern European ports (Norway, Iceland, UK): mix of Schuko and Type G
- Alaska and Pacific Northwest ports: US 120 V, no adapter needed
Pack one adapter for the regional plug shape of your port stops. Most cruise itineraries stay within one electrical region.
Sleep apnea machines (CPAP) and medical devices
Cruise lines allow CPAP machines but often require advance notice. Pack:
- The CPAP and its standard power cord
- Distilled water (cruise lines often supply this on request)
- A short extension cord if your cabin outlet placement is far from the bedside (note: bring up with guest services rather than smuggling a household extension)
For other medical devices (insulin pumps, oxygen concentrators), contact the cruise line ahead of sailing to confirm the cabin has appropriate power and notify embarkation staff to expect the equipment.
A few specific cabin recommendations
Inside cabins on older ships
You may have only 1-2 outlets total, often poorly placed (high on the wall, behind the bed, on the closet door). Pack a short extension that's cruise-approved or just accept the single-outlet limit.
Suite categories
Suites usually have 4-8 outlets in good locations. You won't need to think about cabin power.
Cabins on Carnival's older Fantasy-class ships (Carnival Inspiration, etc.)
These cabins are infamously light on outlets, sometimes just one 120 V outlet plus one hair dryer outlet (a higher-amperage US outlet not always suitable for chargers). A 4-port USB charger is essential.
The bottom line
For most cruise passengers from the US, the answer to "do I need a travel adapter?" is no, your US plug works in cabin US outlets. Bring a 4-port USB-C/USB-A wall charger to handle multiple devices off one outlet, and skip the household power strip you might be tempted to pack (it will be confiscated).
For European passengers on US-headquartered cruises, a Europlug-to-US adapter is worth the few dollars. For everyone, a 20,000 mAh power bank pays for itself the first time you spend a long day in port.