Chargers Rated 100–240V Need Only a Plug Adapter Abroad

If the Input line on your charger reads 100–240V, a plug adapter is all it needs abroad: the adapter changes the plug shape, and the charger handles the voltage itself. Apple’s USB power adapters, Samsung’s 25W PD Power Adapter (affiliate link to Amazon, opens in a new tab), Google’s 45W USB-C Power Charger (affiliate link to Amazon, opens in a new tab) and the MacBook Air (M5) (affiliate link to Amazon, opens in a new tab) are all rated for that range on their makers’ own pages.

A voltage converter is for something built for one country’s supply, such as a US hair dryer Dyson rates at 110–120V.

What the makers rate them for

Device	Input rating the maker states	Converter needed?
Apple USB power adapters (5W to 20W)	100V AC to 240V AC, 50Hz to 60Hz	No, plug adapter only
MacBook Air (M5) (affiliate link to Amazon, opens in a new tab)	Line voltage 100V to 240V AC, 50Hz to 60Hz	No, plug adapter only
Samsung 25W PD Power Adapter (EP-T2510NBEGUS) (affiliate link to Amazon, opens in a new tab)	Input voltage 100–240V	No, plug adapter only
Google 45W USB-C Power Charger (affiliate link to Amazon, opens in a new tab)	Input 100–240V, 50/60Hz	No, plug adapter only
Dyson Supersonic Travel hair dryer (affiliate link to Amazon, opens in a new tab)	110–240V	No; Dyson recommends an adapter rated to 1300W
Dyson Supersonic hair dryer, US model	110–120V	Not rated above 120V; Dyson refers you to the manual

Apple’s statement covers its whole line of USB power adapters, not one model: its support page says they “are designed for use with power sources rated to provide 100V AC to 240V AC at 50Hz to 60Hz”. A phone charger rated that way takes the voltage change in its stride; the plug shape is the only thing to solve.

How to read the label

Look for the line that starts with Input. Google’s 45W charger lists it as “Input 100-240V, 50/60 Hz”, and Samsung’s spec table as “Input Voltage 100-240 V”. Two numbers matter:

• The voltage range. 100–240V is what you want for travel. A single figure, or a narrow span such as 110–120V, means the device was built for one kind of supply.
• The frequency. 50/60Hz means it accepts either mains frequency. Apple and Google both list it next to the voltage.

The Output line is a separate figure: it says what the charger sends to your phone, not what it accepts from the wall. Even that is a ceiling rather than a promise, since the phone decides how much of a charger’s rated power it draws.

Anker, which sells both chargers and travel adapters, states the rule in its FAQ: “Most modern phones, laptops, and tablets accept 100–240V, so they only need an international travel adapter. Always check your device’s input rating before traveling.”

A plug adapter converts nothing

The adapter only reshapes the plug. Anker says of its Nano Travel Adapter that “no conversion is involved” and that it “is not a voltage converter”. Whatever you plug into it meets the local voltage as it is, which is why the charger’s own rating is the thing to check.

Apple’s World Travel Adapter Kit (affiliate link to Amazon, opens in a new tab) works the same way. It “works with any Apple USB, USB-C, or MagSafe power adapter that has a removable AC wall adapter”, the part Apple calls a duckhead: slide it off and attach the pin set for your destination. Apple adds a caution that applies to any charger: a country may say its power is within your device’s range, but “electrical spikes and brown-outs can damage electrical equipment.”

Hair dryers: which model you own decides it

Dyson, the one hair dryer maker we read, sells two models with different answers. The standard Supersonic sold in the US is rated 110–120V, and Dyson says it “has been precisely engineered for fast drying and styling at the voltage of the country in which it was purchased.” Dyson’s FAQ refers US owners to the manual rather than to a converter. Its rating does not cover outlets above 120V, so a plug adapter alone does not make it usable on them.

The Supersonic Travel (affiliate link to Amazon, opens in a new tab) is rated 110–240V. For that one, Dyson recommends a plug adapter “rated to 1300W across the full voltage range (100-240V)”, or a single country-to-country adapter, “and not universal adapters”. A plug adapter has a power limit of its own, so a hair dryer asks more of it than a phone charger does.

Which plug fits where

The IEC, the standards body, has retired its interactive World Plugs guide; its page now suggests checking with your travel adapter’s maker. Apple’s kit is labelled by destination, which makes a usable list:

Apple label	Where Apple says it fits	Pins
USA	Japan and North America	Flat, parallel blades with holes
GBR	Hong Kong, Qatar, Republic of Ireland, Singapore, United Kingdom	Three-prong blades
EUR	Continental Europe	Slightly angled, round, thin pins
AUS	Australia and New Zealand	Flat, angled blades
CHN	China mainland	Flat, parallel blades without holes
KOR	Korea	Round, thick pins
BRA	Brazil	Round, thin pins

Apple notes that some of these adapters may work in more countries than it lists. It groups Japan with North America under one label, so the pin set to pack for Japan is Apple’s USA one.

Before you fly

Chargers sort out the wall. The battery in your bag is a separate question: power banks fly carry-on only, and Delta, American and Southwest cap them at 100Wh. And once the phone is charged, check what your carrier charges for a day abroad before you turn data on.

Questions people ask

Do I need a voltage converter for my iPhone charger abroad?

Not for an Apple USB power adapter. Apple says they are designed for power sources of 100V to 240V AC at 50Hz to 60Hz. You need a plug adapter that fits the local outlet, such as one from Apple’s World Travel Adapter Kit.

Can I use my laptop charger abroad with just a plug adapter?

Yes, if its Input line reads 100–240V. Apple lists the MacBook Air (M5) line voltage as 100V to 240V AC. For any other laptop, read the Input line on its power adapter or on the maker’s spec page before you go.

What is the difference between a plug adapter and a voltage converter?

Anker puts it this way: a travel adapter changes the plug shape so it fits the wall outlet, while a voltage converter changes the electrical voltage for devices that do not support international power standards.

Does a travel adapter convert voltage?

Not the ones we read about. Anker says its Nano Travel Adapter “is not a voltage converter” and that “no conversion is involved”. Whatever you plug into an adapter has to handle the local voltage itself.

Can I use my US hair dryer abroad?

Check its rating first. Dyson says its US Supersonic is 110–120V and built for the voltage of the country where it was bought, and refers owners to the manual. Its Supersonic Travel model accepts 110–240V.

What does 50/60Hz mean on a charger?

It is the frequency of the mains supply the charger accepts, listed beside the voltage. Apple’s USB power adapters and Google’s 45W charger both list 50Hz to 60Hz alongside 100–240V.