At What Voltage Will a Car Battery Fail to Start the Engine?

1 Answers
DiDelaney
07/29/25 6:00pm
When the car battery voltage drops below 12.2V and the load voltage is below 9.5V, the vehicle is likely to fail to start. Car owners should regularly inspect their car batteries during daily use. This can be done by checking the observation window on the battery. If the window displays black, it indicates the battery needs charging; green signifies good condition, while white suggests insufficient electrolyte. The battery is a crucial component of a car and also a wearable part that requires periodic replacement. As the number of charge and discharge cycles increases, the battery's performance may decline, hence the need for regular replacement.
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