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Published on 12-19-2011 03:22 AM
Many people listen to their stereo without the engine running. This often leads to dead batteries and a vehicle that won't start. A battery isolator will let you completely discharge one battery without discharging the starting battery.
Mechanics of a Battery Isolator
A battery isolator separates multiple batteries from one another to ensure that a vehicle has access to a backup power source. In addition, a battery isolator ensures that a vehicle's electrical system does not pull power from multiple batteries at the same time, which would rapidly drain all of the batteries and cause the electrical system to fail. A simple setup is one in which a vehicle contains two batteries, both of which are attached to the isolator. The battery isolator is attached to the vehicle's alternator, which is the device responsible for providing the vehicle with electrical power and for charging the vehicle's battery. The battery isolator uses sensors to determine the number of batteries it is connected to and to draw power from the strongest battery. The idle batteries are charged by the alternator, and the battery isolator can quickly switch power sources if the battery in use suddenly fails.
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