There are several signs that a car battery may need to be replaced. Auto parts supplier give some common signs:
Slow engine crank
If the engine cranks slowly or takes longer than usual to start, it may be a sign that the battery is weak and needs to be replaced.
Dashboard warning light
If the battery warning light on the dashboard comes on, it may be a sign that the battery is not charging properly or has a low voltage.
Electrical issues
If the car’s electrical components, such as the headlights or interior lights, are dim or not working properly, it may be a sign of a weak battery.
Corrosion
If there is a buildup of white, powdery substance on the battery terminals, it may be a sign of corrosion and can affect the battery’s performance.
Age
Car batteries typically have a lifespan of 3-5 years, depending on the make and model of the vehicle. If the battery is older than this, it may be time to replace it.
Swollen battery case
If the battery case appears swollen or bloated, it may be a sign of a leak or other internal damage, and the battery should be replaced immediately.
Neglecting a weak or damaged battery can lead to a breakdown or other serious issues while driving.