Most laptops can handle both the 110 watt North American voltage and the 220/240 watt voltage used in most other parts of the world.You can look for the indications panel or sticker on your device, which should tell you the model number, wattage and voltage of your laptop. This may be located under a removable battery or on a power brick. Dual voltage electronics are marked "100/240V" or "110~220vac." If your laptop or plug does not have a indications panel, you can check the owner's manual.
If you determine that your computer needs a voltage converter, you will need to purchase a model with the correct plug for the country you will be traveling to. Converters are usually small bricks that can be easily packed, and simply connect to your regular plug. You will also need a converter rated for continuous use.
While your laptop may be dual voltage, peripheral computer devices like speakers, monitors, printers and scanners may require a voltage converter. If you travel with these devices, you should first look for models that run off your computer's power through a USB port. Most peripherals built for portability or travel are dual voltage, but you should always check before plugging into an overseas outlet.
Even with a dual voltage laptop, you will most likely need a plug adapter. Countries around the world have a different number and formation of prongs on plugs. In case of faulty or unreliable electricity, a surge protector will also add a second layer of protection for your computer. Make sure your surge protector is designed for a 220-240 volt electrical system with the proper plug. You do not want to run your surge protector through a converter or adapter. All-in-one adapters and surge protectors fit easily into your bag. Be sure to look for a model with multiple types of plugs if you travel globally on a regular basis.
