![]() ![]() The FAA regulations apply only during takeoff and landing (and even those are currently being reconsidered). ![]() ![]() Not for aircraft safetyĬontrary to a commonly held belief, it is not for travel on aircraft. If you really want to save maximum battery life, then you want it to be consuming zero power. It may not be a lot of power, but when you are commuting, every little bit helps. When you disable wifi in your settings, the device is still powered up and using some power. The physical button is not just to disable the wifi, but it should actually power off the device hardware. I have heard that this is a requirement in certain military environments, but I have not seen any evidence that this drove the development of the feature on any laptops. The radio switch usually turns off all wireless communication, including Bluetooth and 3G. A hardware radio switch has security benefits to it in that when it is off, you know for a fact that nothing is connected to your laptop wirelessly. ![]()
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