What is the normal value for car battery testing?
2 Answers
It is normal for a car battery test to show a lifespan above 40%, but it also needs to be judged based on the age of the battery. The lifespan of a car battery is typically around 3-5 years, and when it reaches this period, replacement should be considered. The following are methods for battery maintenance: Timely charging: When the ammeter pointer shows insufficient power, charge the battery promptly. Use special replenishing fluid when the battery is low: When the electrolyte is insufficient, add distilled water or a special fluid. Do not use drinking purified water as a substitute, as it contains various trace elements that can adversely affect the battery.
I remember when I first learned to drive, dealing with battery issues was a headache. Later, I learned that understanding the normal values for battery testing is crucial. When the car is turned off, the battery voltage measured with a multimeter should be around 12.6 volts to be considered healthy; if it's below 12.4 volts, there might be an issue with insufficient charging. The moment you start the engine, the voltage will drop to 10 volts or above, but it shouldn’t go below 9.6 volts, otherwise, you might have trouble starting the car. Additionally, the CCA (Cold Cranking Amps) value is very important—this depends on your car model, with most vehicles ranging between 400 to 700 amps. My car has a CCA of 550 amps. During every maintenance visit, the technician checks it with a load tester, and if the CCA drops below 75% or the voltage is unstable, it’s time to replace the battery. I also use simple tools to test it at home. Always remember to turn off the headlights after parking to avoid excessive battery discharge, which helps extend the battery’s lifespan.
