Hunhun, according to my knowledge, usually the voltage on the airplane is 110V. However, only first class and business class seats has the outlets.
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Answered by Kristofer from USA | Feb. 11, 2016 01:01
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Most devices you would use on an airplane can handle 100-240V such as laptop computers. The acceptable voltage range should be either on the device in case of an independent power supply or specified in the manual.