Power adapters are devices that make it possible to connect different power sources to a variety of devices. In some cases, a power adapter can make it possible to use an electrical device like a laptop computer in a foreign country, with no adverse effects to the device itself. Depending on the purpose and function, power adapters can be relatively inexpensive or quite costly.

One of the most common types of power adapter is the laptop adapter. Models designed for use by international travelers make it possible for a businessperson from the United States to use his or her laptop computer while on a trip to Europe or the United Kingdom. Some solutions are actually adapter sets that not only provide a selection of prongs for use with different types of outlets, but also transformers that help to convert alternating current to direct current. These kits can help trim travel expenses considerably, since there is no need to pay for expensive conversions during the stay, or to rent equipment for the duration of the trip.