What Is a Travel Charger? | Plug Compatibility, Not Voltage

When you’re packing for a trip abroad, the question of what is a travel charger comes down to one key distinction. A travel charger handles the physical shape of foreign wall outlets, letting you plug in devices that already support worldwide voltage. Most phones, tablets, laptops, and camera chargers today accept 100–240V input, so a simple plug adapter is all you need. The confusion starts when people mistake these adapters for voltage converters, which is a different tool entirely. The table below shows what a typical modern travel charger actually offers.

What a Travel Charger Actually Does

A travel charger solves the mismatch between your device’s plug and the wall outlet in another country. It is not a voltage converter, a point Anker’s official documentation states directly.

Here is what that means in practice:

• Plug compatibility:
• Wide-voltage pass-through: It works with devices rated for 100–240V, 50/60Hz AC power, which includes nearly all modern electronics.
• USB charging built in: A USB-C port delivers up to 20W, while the USB-A port charges at regular speed.
• AC outlet support:

Some travel chargers include GaN (gallium nitride) technology for faster charging in a smaller chassis. Anker’s current lineup, for instance, includes the Anker Prime Charger (200W, 6 Ports, GaN) and the Anker 735 Charger (Nano II 65W), both designed for laptops and multiple devices on the go.

What a Travel Charger Is NOT: Voltage Conversion

A travel charger is not a voltage converter. This is the single most common mistake travelers make. Anker’s official note states plainly: “This travel adapter is not a voltage converter.” It only changes the physical shape of your plug, not the electrical current flowing through it.

A voltage converter, by contrast, transforms 220V European current down to 110V for appliances built only for US power. The rules are simple:

• Dual-voltage devices (phones, laptops, camera batteries, most USB chargers) need only a plug adapter.
• Single-voltage appliances (hair dryers, curling irons, some kitchen gadgets) need a converter, not just an adapter.
• Check the label: If your device says “100–240V,” you are safe with a travel charger alone.

If you plug a 110V-only hair dryer into a travel adapter in Europe, it will likely fry the device, because the adapter does nothing to step the voltage down.

Port Limits and Compatibility Caveats

Travel chargers have real limits that vary by model, and knowing them before you travel saves you from a dead battery abroad.

Another hidden limit is plug-type support. If your destination uses those outlets, you need a different adapter.

For most trips, a 20W to 65W GaN charger with multiple ports handles a phone, earbuds, and a tablet at once. If you are carrying a laptop, look for a model rated at 65W or higher with Power Delivery support. For a tested rundown of models that fit different travel styles, our recommendations for the best travel chargers cover the options worth your money.

TSA Rules for Flying With Chargers

The Transportation Security Administration has a specific rule for power banks and portable chargers: any charger containing a lithium-ion battery must be packed in your carry-on bag, not checked luggage. This applies to external battery packs and power banks, which are common travel companions. Chargers that plug into the wall, like the travel adapters described above, do not contain lithium-ion batteries and face no such restriction, but a USB power bank absolutely does.

The reason is fire safety: lithium-ion batteries in the cargo hold pose a fire risk that cabin crews can manage in the passenger cabin but not below deck. This rule applies regardless of the battery’s capacity, so pack every power bank in your carry-on every time.