Although the starter motor needs an electrical surge for it to work correctly, it should not continuously drain power from the car’s battery.
This is because it only operates for a very short period of time when the driver first turns the key or presses the ignition button.
The time the starter motor is engaged is less than five seconds – unless there is a problem.
If there is an issue, where the starter motor is being used for an extended period of time, then it can start draining the battery.
However, this would need to be for a very long time for it to cause major problems for the car battery.
Should the battery drain significantly because of the starter motor, then it is normally a sign that there was already an issue with your car battery.
https://www.starterstock.com/