What are the signs that a car battery needs replacement?
2 Answers
Car batteries need replacement when they have insufficient charge or are faulty. Battery maintenance methods include: 1. Charge promptly when the ammeter indicates low charge; 2. Adjust electrolyte density according to regional and seasonal standards; 3. Add distilled water or special replenishing fluid when electrolyte is low; 4. Limit engine cranking to 5 seconds maximum per attempt; 5. Start the vehicle periodically if the battery remains unused for extended periods; 6. Regularly check that the battery vent holes remain unobstructed; 7. Inspect battery terminals for oxidation; 8. Examine all electrical circuits for aging or short-circuiting.
I've noticed that when driving for extended periods, the signs of a failing battery become quite obvious. When starting the engine, there's a noticeable sluggishness—turning the key results in the engine cranking several times before firing up, which is usually a sign of insufficient power. Additionally, the car lights become dim or flicker, especially noticeable during night driving; sometimes the air conditioning or audio system also operates abnormally. Upon inspecting the battery's exterior, white or green corrosion can be seen on the terminal heads, or the battery casing may appear swollen or leaking, all of which are evidence of aging. Regularly measuring the voltage with a multimeter is advisable—if it remains below 12V even after charging, it's generally time for a replacement. A battery's lifespan is typically three to five years, with harsh weather conditions like cold winters or hot summers accelerating wear. Frequent short trips can lead to insufficient charging, making it easier to deplete the battery. If you encounter these symptoms, don't delay—replacing the battery promptly can prevent the hassle of a breakdown.
