How to Tell if a Car Battery is Good or Not?

[Everdeen]

By checking the battery's observation window, you can see three colors: green indicates sufficient charge, black means slightly discharged, and white means the battery is dead and needs replacement. Below is some relevant information about car batteries: Difficulty Starting the Car: If there are no other factors like engine issues affecting it, this already indicates that the battery needs replacement. However, in winter, it might just be due to the weather. Headlights Dimming When Decelerating: For example, during traffic jams or when waiting, the headlights may become much dimmer. This could be due to the battery's power output being too low in deceleration mode. If the battery is already low and also needs to power devices like the cigarette lighter or dashcam, the high power demand of the headlights can cause the lights to dim further. Squealing Noise When Starting: When the battery is low on charge or unable to discharge, the starter may produce a squealing noise as it fails to operate properly. This issue becomes more pronounced during autumn and winter when temperatures drop.