Can I use my phone charger anywhere?

Yes, virtually all phone chargers are dual voltage (100-240V). You just need a plug adapter to fit the outlet shape.

Why are some devices dual voltage and others aren't?

Electronics with switching power supplies (phones, laptops) can handle voltage ranges. Simple devices with transformers or heating elements often can't.

What happens if I use the wrong one?

Using a 110V device in a 220V outlet without a converter will likely destroy it instantly. Using an adapter on a dual-voltage device is perfectly safe.

Are expensive converters worth it?

For high-wattage devices like hair dryers, yes. Cheap converters can overheat or damage your electronics. For low-power devices, mid-range options work fine.

How to Know When You Need an Adapter vs a Converter for Travel

Most modern electronics (phones, laptops, cameras) only need a plug adapter to fit foreign outlets. You need a voltage converter only for older devices that can't handle 110-240V, like some hair dryers or small appliances without dual voltage.

Check your device's voltage rating. Look for a label on your device or power brick. If it says 100-240V or 110-240V, you only need an adapter. If it says 110V only or has a single voltage number, you need a converter.
Identify what you're bringing. Phone chargers, laptop chargers, cameras, tablets, and electric toothbrushes are almost always dual voltage. Hair dryers, curling irons, and small kitchen appliances often are not.
Get the right adapter type. Buy a universal adapter that covers your destinations, or research the specific plug types. Type C works in most of Europe, Type G in UK, Type A in Japan and US.
Buy a converter if needed. For 110V-only devices, buy a step-down converter rated for your device's wattage. Hair dryers need 1500+ watt converters. Small electronics need 50-100 watts.
Test before you travel. Plug your adapter into a wall outlet at home to make sure it fits snugly. If buying a converter, test it with your device before traveling.

Can I use my phone charger anywhere?: Yes, virtually all phone chargers are dual voltage (100-240V). You just need a plug adapter to fit the outlet shape.
Why are some devices dual voltage and others aren't?: Electronics with switching power supplies (phones, laptops) can handle voltage ranges. Simple devices with transformers or heating elements often can't.
What happens if I use the wrong one?: Using a 110V device in a 220V outlet without a converter will likely destroy it instantly. Using an adapter on a dual-voltage device is perfectly safe.
Are expensive converters worth it?: For high-wattage devices like hair dryers, yes. Cheap converters can overheat or damage your electronics. For low-power devices, mid-range options work fine.