Will A Alternator Charge A Dead Battery. Finally the alternator completes this cycle by charging the battery. I start with the assumption that the alternator is working correctly and that the battery is not defective.
To fully charge a nearly dead battery could take a very long drive with everything electrical turned off and as stated above could result in a near-useless surface charge andor a dead alternator. However the cars alternator can only supply just enough power to keep your cars battery at a full charge. Testing the Alternator and the Battery for an Answer.
However when you use jumper cables to start your vehicle you are placing a tremendous strain on your vehicles alternator and battery.
Eventually the level of battery charge diminishes to the point where no matter how much power the alternator gives to it the battery cant hold enough power to start the car. If the alternator is good and the battery is dead flat but otherwise OK you will need to start the car with another battery. Then they go to test the battery with a battery tester device and see the battery is dead. Answer 1 of 6.
