5 Signs Your Car Battery Needs Replacing

5 Signs your car battery needs replacingFinding out when your car battery needs replacing can be tricky. Over time the battery in your car will inevitably deteriorate. Especially winter can put increased strain on your battery as it has to work much harder. Come spring you may find that your battery’s condition has become so bad that it can’t keep the car running properly. Sometimes the battery will simply stop working from one day to the next. Often, though, there will be signs which can point to a deteriorating battery.

Signs Your Car Battery Needs Replacing


  1. Dimming headlights & interior lights

    One tell-tale sign of a weak battery is dimming lights in and around the car. If the battery just isn’t powerful enough the strength of your lights will be weaker. The headlights may not be powerful enough which would prevent you from seeing properly in the dark. Make sure to get help from a mechanic immediately to get this resolved, to stay safe on the road.


  2. Slow start of engine
    If it takes a long time to start the car then in most cases it will have something to do with the battery. Try starting the engine, if the starter motor isn’t able to ‘crank over’ over the engine, then often it is a case of a drained battery.

  3. Battery leak
    Batteries contain battery fluid which can leak. Usually the leaks can appear on top of the battery around the battery terminals, but a damaged casing can also lead to leaks.

    If the battery fluid leaks then it’s ability to charge and provide power will decrease. It will lead to a less powerful battery. Take care to address this timely if you notice it. Battery fluid is nasty stuff and will cause corrosion around the battery.


  4. Check Engine Light
    Sometimes something as simple as the check engine light coming on can point to problem with the battery. It usually comes on when the battery is weak.

  5. Bloated Battery Case
    Whilst this may sound peculiar, your battery case can expand over time, especially if it has overheated. In turn the battery will deteriorate and battery life will decrease.


If you’re not quite sure if your battery needs replacing it is advisable to get help from a professional mechanic who can do a battery check. A mechanic will be able to find out if the battery really needs replacing. Make sure to also follow manufacturer guidelines on battery replacement intervals.

About Kurt Schleier

Resident classic car enthusiast and blogger at Clickmechanic.