How to Detect the Good or Bad of a Car Battery

Here are some tips for detecting the good or bad condition of a car battery:

1. Measure the Voltage

Use a battery testing仪 or multimeter to measure the voltage of the battery. Under normal circumstances, the voltage of the battery in an open circuit should be around 13V, and the voltage under load should not be less than 12V. The starting voltage should not be less than 9.5V.

2. Observe

Take a close look at the two sides of the battery to see if there is any significant expansion or bulging, and check if there is a white or green powder-like substance around the battery terminals. If so, it may indicate that the battery's performance is deteriorating.

3. Check the Shell

Examine the battery shell to see if it has any cracks. If so, it may lead to the electrolytic fluid being exposed to the environment and cause腐蚀. In such a case, it is recommended to replace the battery as soon as possible.

In summary, testing the voltage, observing the battery and checking its shell are effective methods to detect the good or bad condition of a car battery. By following these simple tips, you can ensure the safety and performance of your car battery.