What electrical adapters will I need overseas?

Episode 1162 (47:09)

John from Austin, TX

John traveled to the UK and he got an inverter that nearly bricked his laptop. Leo says that most of the time laptops don't need a transformer because they're built for a world market. Just a plug converter is needed, or a travel adapter. They're only about $10, even at the airport. He should always look in the fine print of the device. It'll tell him the voltage it can handle.