Car Battery Smoking-Bubbling, Charging and Solution

A car’s battery is essential for operating the engine; without it, the vehicle simply won’t start. They are subjected to frequent charges and discharges as well as high temperatures from their typical location near the engine over its service life. So if they start to fail, it is best to replace them quickly, since this can cause a significant issue and leave your car immobile.
The smoke or bubbling of your car battery indicates that your car’s electric system is malfunctioning. You may end up with a disastrous situation if you do not pay attention to your car battery or get it tested by an expert as soon as possible. As the battery ages, some of the acid and water may evaporate, causing the mixture to get disturbed.
As a result, you must go through this post to understand the causes and solutions to smoking and bubbling car batteries.

Car Battery Smoking and Bubbling

Exploitation and temperature circumstances have a major influence on car battery life. Neglect and inadequate servicing can cut battery life drastically due to its low density – for instance, the electrolyte in a discharged battery can freeze in winter while in summer it can boil. You should take action immediately; boiling is caused by hydrolysis, i.e. the breakdown of water into oxygen and hydrogen, indicating there’s an issue with the vehicle’s electric system. If the battery bubbles, what should be done?
Take action, depending on the cause of the boiling electrolyte. The car’s battery must be overcharged, so a voltage regulator or generator must be installed. For this, you’ll need to call a car electrician. There are three types of voltage regulators: mechanical, electromechanical, and electronic. Depending on your vehicle’s type, specialists will either replace it or regulate it.
Suppose there is a problem with the battery itself. Assume the battery overheats as a result of a short circuit in one of the cans. In this case, the battery needs to be replaced. If the battery is still new, the manufacturer may provide it under their warranty. You will almost certainly have to replace it if the warranty has expired. With modern batteries, it is extremely difficult to restore a car battery whose cells are short circuited.

Car Battery Smoking When Charging

We need to understand the reasons for the rotten-egg odor, smoke, and hissing sound and then find a way to avoid it in the future.


The problem is excessive heat, especially during the summer or in warmer climates. Batteries should not be charged in high temperatures due to the risk of explosion.
In hot places, batteries burn because their electrolyte may boil and evaporate, resulting in smoke. Smoke can destroy batteries if left unattended.


Overcharging a battery produces too much gas, raising the pressure inside the battery. The extra gas emitted by an overcharged battery is hazardous due to its flammability and poisonous properties.
You should always use chargers that are capable of regulating amperage and voltage, as batteries that cannot release pressure quickly can explode, resulting in deadly accidents. Overcharging a battery is another factor that can cause this issue.
Specific chargers will continue charging a battery even after it has reached full charge. This causes the battery to burn.

Faulty Alternator

In most cars, the alternator charges the battery while the vehicle is in motion. Alternators, like any other machine, are prone to failure.
During operation, the alternator output should be between 13.7 and 14.7 volts, which can be checked directly at the battery terminals if the alternator is faulty.

Dead Battery

As a result, if you discover that your battery is emitting smoke, the first thing you should consider is the battery’s age.
Get a new battery if you don’t remember when you got it.
Even so, you might wonder how a dead battery could start a car. However, you should be aware that the battery may have used the last of its stored energy to start the car. Even before this problem arises, you should buy a new battery.

Short-Circuiting or Loss of Connection

Battery connections should be tightly tightened and firmly screwed, according to the manufacturer’s instructions. As a result, a sliding issue might damage the battery.
A smoking battery could indicate that the positive and negative plates have collided. Look for the source of the short-circuiting before making any decisions.

What to do if a car battery starts smoking?

Getting away from a smoking battery can be hazardous to your health because of the gases it emits. When the battery has cooled down, you will be able to determine the source of the problem. It is possible for the battery to explode, resulting in catastrophic consequences.
A professional can assist you in resolving the problem. It can be difficult to tell if your alternator is not working correctly. Also, because there are so many wires, finding a short may be challenging.
Parking your car in a cold location allows the battery to cool down. Overheating might be a problem, so keep the battery in a cool place.
Overcharging can only be resolved by removing the charger, cooling it, and inspecting the charger to make sure that it is working. If the battery starts to smoke during charging, turn off the charger immediately.


A car’s battery is essential for it to start and run; hence, we outlined the common problems it might face, with their likely reasons and solutions. If your automobile battery is smoking, bubbling, or you suspect there’s any issue with it, you can either inspect it yourself or let a pro look into it. They will be able to mend any damage to the battery and address any equivalent underlying complications to make sure that your car runs perfectly again.