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2. Electric power conversion - Wikipedia

   en.wikipedia.org/wiki/Electric_power_conversion

   Conversely, internal 400 Hz internal power may be converted to 50 Hz or 60 Hz for convenience power outlets available to passengers during flight. Certain specialized circuits can also be considered power converters, such as the flyback transformer subsystem powering a CRT , generating high voltage at approximately 15 kHz.

3. Voltage converter - Wikipedia

   en.wikipedia.org/wiki/Voltage_converter

   Voltage converters can be used in vehicles with 12 V DC outlets. A simple voltage dropper can be used to reduce the voltage for low-power devices; if more than 12V is required, or for high-powered devices, a switched-mode power supply is used.

4. Three-prong adaptor - Wikipedia

   en.wikipedia.org/wiki/Three-prong_adaptor

   The ground tab is designed to be attached to the outlet faceplate screw, which is supposed to be connected to the building electrical ground. A cheater plug, AC ground lifter or three-prong/two-prong adapter is an adapter that allows a NEMA 5-15P grounding-type plug (three prongs) to connect to a NEMA 1-15R non-grounding receptacle (two slots).

5. The 8 tech gadgets to make traveling easier, according to ...

   www.aol.com/lifestyle/the-8-tech-gadgets-to-make...

   "The Bestek converter was the best I have ever purchased. With phones, iPads, curling irons, computers, etc., the converter makes it so easy to charge it all up at the same time.

6. Power supply - Wikipedia

   en.wikipedia.org/wiki/Power_supply

   An external power supply, AC adapter or power brick, is a power supply located in the load's AC power cord that plugs into a wall outlet; a wall wart is an external supply integrated with the outlet plug itself. These are popular in consumer electronics because of their safety; the hazardous 120 or 240 volt main current is transformed down to a ...

7. Adapter - Wikipedia

   en.wikipedia.org/wiki/Adapter

   A passive electric power adapter, sometimes called a travel plug or travel adapter, allows using a plug from one region with a foreign socket. As other countries supply 120-volt, 60 Hz AC, using a travel adapter in a country with a different supply poses a safety hazard if the connected device does not support both input voltages.