What Are the Reasons for a Dead Car Battery?
2 Answers
Reasons for a dead car battery include: 1. Battery power depletion; 2. Insufficient battery electrolyte; 3. Internal battery failure causing damage. Methods for maintaining a car battery are: 1. Start the car periodically to charge the battery; 2. When electrolyte is low, replenish with distilled water or a specialized replenishing fluid; 3. Regularly check if the small holes on the battery cover are ventilated during daily driving; 4. Inspect the positive and negative terminals for signs of oxidation; 5. Check all parts of the circuit for aging or short circuits; 6. Turn off electrical devices when leaving the car. The functions of a car battery are: 1. Powering the starting system, ignition system, and electronic fuel injection system when starting the engine; 2. Providing power to the car's electrical devices when the engine is off or at low idle; 3. Supplying power to electrical devices when the generator's output is insufficient; 4. Mitigating voltage surges in the electrical system to protect the car's electronic devices; 5. Storing excess electricity generated by the alternator.
I've driven several types of cars, and the issue of a dead car battery has given me headaches a few times. The most common problem is battery aging. Typically, after three or four years of use, the battery capacity decreases, especially in winter when low temperatures make the electrolyte less active, making it harder to start the engine. Another issue is when the alternator isn't working. It's supposed to charge the battery after the engine starts, but if it's broken, the battery will never be fully charged. Leakage is also a major concern. For example, once I didn't close the car door properly, and the lights stayed on all night, draining the battery completely. Additionally, too many short trips are problematic because the engine doesn't run at high enough RPMs to charge the battery sufficiently. I recommend regularly checking if the battery terminals are clean to avoid corrosion and poor contact, which can help extend the battery's lifespan.
