Voltage Converters (220 to 120)

I've been looking for a voltage converter for my trip to South Korea.

The ones I've been finding on the internet are ones like these

http://www.totalvac.com/store/graphi...01/TL265BP.jpg

Which is fine if I'm using a 110 volt two prong plugin

But for a plug like my laptop has (a three prong 110)

http://www.advin.com/uv-eraser-plug-USA-W512.JPG

I can't find a voltage converter that will accept that kind of plug.

Do I just need to carry around some adapters like this?

http://img.shopping.com/cctool/PrdIm...4/21763956.JPG