What kind of switch is commonly used for dual battery systems in aircraft?

A battery selector switch is utilized in dual battery systems in aircraft to manage and control the operation of both batteries effectively. This switch enables pilots to select which battery is in use for powering the electrical systems, as well as allowing for the ability to charge one battery while using the other. This functionality is crucial for maintaining control over the aircraft's power supply, particularly in situations where one battery may be impaired or needs servicing.

The design of the battery selector switch incorporates multiple positions, typically allowing for "Battery 1," "Battery 2," and "Both." This versatility ensures that the aircraft can operate reliably even with a single battery failure by providing the option to switch power sources. Additionally, it can prevent overloading a single battery by allowing pilots to distribute electrical loads between the two batteries.

In contrast, the other types of switches mentioned serve different functions. A master switch generally controls the overall supply of electrical power to the aircraft systems but does not switch between multiple batteries. A toggle switch and a push-button switch both control single functions but lack the necessary design and capability to manage dual battery systems effectively. Therefore, a battery selector switch is the most appropriate and specialized choice for controlling dual battery systems in aircraft.