cars do not need the battery to run.
they need them to start. And after starting the alternator charges the battery back and provides the current for the car to run off of like 323driver said.
No running your car w/o the battery wont kill your alternator. Your alternator does not draw power from the battery while the car is running.
If you have a bad alternator you can test it by starting the car, then pulling the battery leads. if the car dies your alternator is crap.
they need them to start. And after starting the alternator charges the battery back and provides the current for the car to run off of like 323driver said.
No running your car w/o the battery wont kill your alternator. Your alternator does not draw power from the battery while the car is running.
If you have a bad alternator you can test it by starting the car, then pulling the battery leads. if the car dies your alternator is crap.
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