In airplanes, electrical power for passengers' laptops and other electrical appliances is typically provided through one of the following methods:
Seat Power Outlets: Many modern airplanes, especially on long-haul flights and premium cabins, are equipped with seat power outlets. These outlets are typically located either beneath the seats or on seatback panels. Passengers can use their own power adapters or charging cables to connect their laptops or other devices directly to these outlets.
In-Seat USB Ports: Some aircraft have in-seat USB ports that allow passengers to charge their devices using USB cables. However, it's important to note that these USB ports may not provide enough power to charge larger devices such as laptops, but they are suitable for charging smartphones, tablets, and other smaller devices.
Portable Battery Packs: In some cases, airlines may provide portable battery packs that can be borrowed or rented by passengers. These battery packs can be used to charge devices during the flight and are returned at the end of the journey or handed over to the cabin crew.
It's important to keep in mind that the availability of power outlets or USB ports can vary depending on the airline, aircraft type, and cabin class. Additionally, during takeoff and landing, some airlines may require passengers to disconnect and stow their devices, which means power supply may not be available during those times. It's always a good idea to check with the airline or review their website to learn about the specific amenities and power options available on your flight.