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May7-07, 05:51 AM
P: 15
I have an idea that your car battery is capable of producing a heck of a lot more than 45A. When you first turn the key on it is probably producing thousands of amps for less than a second. The first thing you have to do is create a magnetic field in the starter. To electrial engineers this is called inrush, not to be confused with starting current. This will last for less than a second but can be extremely high. Once the magnetic field is created then the normal starting current is maintained. This could be in the area of 500A or higher but I am just guessing.