Car batteries, while essential for powering a vehicle, are prone to various issues. These batteries are exposed to constant charging and discharging, temperature fluctuations and vibrations, all of which wear them down over time. Among the many issues that can arise, one of the most concerning is a swollen car battery.
This condition indicates that something has gone wrong internally. It can also be a precursor to dangerous outcomes if not addressed promptly. Understanding the root causes of battery swelling helps take timely preventive measures to protect both the vehicle and passenger safety.
Symptoms of A Swollen Car Battery
A swollen car battery is a sign of a potentially serious issue. That is why, recognising the symptoms early can prevent further damage or even safety hazards. Here are the key signs to watch out for which are also a sign to replace your car battery:
Bulging or Distorted Battery Case
The most obvious sign is a visibly swollen or bloated battery case. It may look like it’s bulging out or deformed. Moreover, the battery may not be able to fit into the compartment properly.
Leaking Fluid
Another common symptom is a strange, sulphuric smell, similar to rotten eggs around the battery or a fluid leaking from it. That is because the battery may be overheating and venting gases.
Battery Overheating
A swollen battery often feels excessively hot to the touch, even after the car has been turned off. This persistent heat is usually a sign of ongoing internal chemical reactions that are out of control.
They are potentially caused by overcharging or a short circuit within the battery. When the internal temperature rises excessively, it produces gases that cannot escape, causing the casing to swell.
Poor Battery Performance
If your vehicle is struggling to start or if you notice dim car headlights, it could be a sign that the battery is failing internally. These symptoms often indicate that the battery is no longer able to hold a charge due to internal damage or chemical imbalance.
Check Engine or Battery Warning Light
Another symptom is dashboard warning lights that depict an issue with the battery or the vehicle’s charging system. This light, often shaped like a battery symbol, serves as an early alert that the battery is not charging correctly or that there’s a problem with the car alternator.
Common Causes of A Swollen Car Battery
A swollen car battery is often a sign of serious underlying issues that can lead to dangerous consequences if not addressed. Here are some reasons for a car battery to swell:
Overcharging
One of the most common causes of a swollen car battery is overcharging. When the car alternator or an external charger delivers too much voltage, it causes the electrolyte inside the battery to overheat. This leads to a buildup of gases and swelling.
Extreme Temperatures
High heat can cause the chemical reactions inside the battery to accelerate, leading to increased internal pressure. This pressure can distort the battery’s casing, especially in warm climates like the UAE. That is why battery swelling is one of the most common car issues due to excessive heat.
Ageing Battery
As batteries age, their internal components degrade. A worn-out battery is more prone to overheating and swelling, especially if it struggles to hold a charge or is frequently drained. Additionally, low-quality or improperly manufactured batteries can also be the culprit. They are more likely to swell due to poor internal design or materials that can’t handle charging stress.
Faulty Voltage Regulator
The voltage regulator ensures the alternator supplies the correct amount of power to the battery. If it malfunctions, it can lead to overcharging, causing the battery to swell.
Internal Short Circuit
A short circuit within the battery cells can generate excessive heat. It builds up pressure inside the case, leading to swelling.
Fixes of A Swollen Car Battery
A swollen car battery is a serious issue that cannot be easily fixed and attempting to repair it can be dangerous. Here are the safest steps to take if you discover a swollen battery:
Turn Off the Vehicle and Disconnect the Battery
Immediately turn off your car if you notice signs of a swollen battery. If possible, disconnect the battery by first removing the negative terminal and then the positive. Be extremely cautious and avoid touching the battery with your bare hands.
Do Not Charge or Use It
A swollen car battery is highly unstable. If you try to charge or jump-start the car battery, it can lead to leaks or fires. Moreover, do not connect it to any charger or power source.
Dispose of It Properly
Swollen batteries are hazardous waste and should not be thrown in regular trash. Take it to a recycling centre, automotive parts store, car garages in Dubai or any other emirate where it can be safely disposed of. Moreover, to handle the battery, wear safety gloves and goggles to protect yourself from potential acid leaks or harmful gases.
Check the Vehicle’s Charging System
Once you’ve safely removed the swollen battery, it’s essential to have your vehicle’s charging system inspected by a professional. This ensures that issues like overcharging or electrical faults aren’t the underlying cause of the battery failure. An unchecked charging system can lead to recurring problems, increasing the risk of damage and safety hazards.
It can also lead to electrical issues after replacing the car battery such as drainage or headlight failure. A thorough inspection helps identify any faults and allows for timely repairs.
Replace with a New Battery
Once the issue is resolved, install a new battery. It should be the one that matches the specifications of your vehicle to prevent future problems. Fortunately, there are many battery replacement centres in Dubai and other emirates that offer such services.
FAQs
Can you charge a swollen car battery?
No, you should never attempt to charge a swollen car battery, as it poses a significant risk of leaks, fires or explosions.
Can a bad alternator cause a battery to swell?
Yes, a bad alternator can cause a battery to swell by overcharging it. It leads to excessive heat and gas buildup inside the battery. However, it can get tricky to pinpoint if its the bad alternator or battery.
What would cause a car battery to overheat?
A car battery can overheat due to overcharging, internal short circuits, high temperatures or a malfunctioning alternator.
That is all about the symptoms, causes and fixes for a swollen car battery. If you notice any of these signs, take your ride to one of the car battery replacement centres in Abu Dhabi or any other emirate you are based in. This will help sort the issue at the earliest.
Also, if you are looking for a change of vehicle, consider these new cars for sale in the UAE. These listings offer many choices, catering to a wide range of preferences.
To learn more about car problems and their fixes, keep reading dubizzle’s cars blog.
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