You land after a long flight, check in, plug in the phone — and it simply doesn't fit the wall. No maps, no messages, no alarm for tomorrow's tour. It's one of the most common and most avoidable travel headaches.
The confusing part is that there are two separate things going on — the shape of the plug and the voltage coming out of the wall — and travellers often mix them up. Getting clear on the difference is what saves you from both a phone that won't charge and, in rarer cases, a gadget that gets fried.
Two different problems: shape and voltage
The first problem is purely physical: countries use different socket shapes, so your home plug won't fit foreign walls. That's what a travel adapter solves — it's just a shape-changer, letting your plug slot into a different socket. It does nothing to the electricity itself.
The second problem is electrical: different regions supply different voltages. Some run on around 110–120V, much of the world on 220–240V, and a device built only for one range can be damaged by the other. The good news is that most modern electronics — phones, laptops, camera and tablet chargers — are dual voltage, happily accepting anything from roughly 100 to 240V. Read the small print on the charger: if it says "INPUT: 100–240V," you only need an adapter, not a converter.
Where people get caught out
The classic mistake is high-wattage appliances with heating elements or motors — a hair dryer, a hair straightener, a travel kettle — built for a single voltage. Plug a 120V-only hair dryer into a 240V socket with just a shape adapter and you can destroy it instantly, sometimes with a bang. These are the devices that occasionally need a true voltage converter, not just an adapter. For most travellers, the simpler answer is to leave them home and use what the hotel provides, since dual-voltage chargers cover everything that really matters.
Check what you need for your destination
Pick a destination to see the plug type, voltage and whether you'll need an adapter.
Adapter check → plug type and voltage by country
General guidance only — plug types can differ even within a region, so confirm your specific destination.
What to actually pack
For the vast majority of trips, the smart kit is small: a universal adapter that handles multiple socket types so you're covered even if your route changes, ideally with a couple of USB ports so you can charge several devices from one wall socket. Check your destination's plug type before you go, confirm your chargers are dual voltage (almost all are), and pack the adapter somewhere you'll reach it the moment you land — carry-on, not checked luggage. Do that, and the dead-phone first night never happens.
Go deeper
Questions
What's the difference between an adapter and a converter?
An adapter only changes the plug's shape so it fits a foreign socket — it doesn't change the electricity. A converter actually changes the voltage. Most travellers only need an adapter, because modern chargers handle both voltages already.
Will my phone or laptop charger work abroad?
Almost certainly. Nearly all phone, laptop, tablet and camera chargers are dual voltage (100–240V). Check the small print on the charger — if it shows "INPUT: 100–240V," you just need a shape adapter, not a converter.
Can I use my hair dryer or straightener overseas?
Only if it's dual voltage — many aren't. Plugging a single-voltage hair dryer into a higher-voltage socket can destroy it instantly. The simplest fix is to leave it home and use the hotel's, or buy a dual-voltage travel version.
Should I buy a universal adapter or country-specific ones?
A universal adapter is usually the better buy — it handles many socket types, so it works across multiple countries and copes if your itinerary changes. Look for one with built-in USB ports so you can charge several devices from one socket.
Where can I buy one if I forget?
Airports, electronics shops and many hotels sell them, but usually at a premium and not always when you need it late at night. Some hotel front desks lend them free — worth asking — but it's far cheaper and less stressful to pack your own in your carry-on.
Do I need an adapter for USB-only devices?
If you charge purely by USB, you still need something that plugs into the foreign wall — but a universal adapter with USB ports, or a USB charger that matches the local socket, does the job. The device itself doesn't care about voltage when charging over USB.
Plug types and voltages vary by country and can differ even within a region. This is general guidance only — always check your specific destination and read your device's voltage rating before plugging in.