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How Much Does a Car Battery Weigh?

  • Things To Know
  • Natasha Young
  • 5 minutes

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A battery is necessary for every car to function, and some require more than one. And it is undoubtedly heavy. If you’ve replaced a car battery, you know the drill. But, if you haven’t, you might wonder, how much does a car battery weigh? And why are they so heavy? Keep reading to know more. 

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Why your car battery’s weight is important? 

You may be wondering why the weight of the battery is important. If you carry the battery out of your car for whatever reason, the weight will determine how easy it is to do so. Therefore, when purchasing a new battery for your vehicle, choose one with the same weight as the previous model. A similar weight indicates that it is likely to have the same power as the previous option. 

Another reason the weight of the battery is important is that it can affect the vehicle’s performance. If you have a car with a small engine, a large or heavy battery can reduce its efficiency. On the other hand, if it is too light for your engine, it will not deliver the proper amount of power. So the bottom line is that if your battery is too heavy or too light for your vehicle, it will impact its performance. 

How to figure out a car battery’s weight? 

Your battery’s label 

This is simple, as all you have to do is check your battery’s label. The battery’s top or side will list the weight in pounds or kilograms, along with other information such as the voltage and battery composition. If the label is worn, you can check the battery’s manual. 

BCI Group Number 

If the battery has no label or is worn down, you can look up the weight using the battery’s BCI group number. You can use this code to determine the size and type of battery. This number can be found on the side of the battery, and the weight can be found in a chart or online. 


Inquire with the manufacturer about the weight of your car battery. They can tell you the battery’s weight, dimensions, and other technical information. 

How much does a car battery weigh? 

A car battery weighs between 25 to 50 pounds, on average. However, this value will vary depending on different factors. For example, the weight of your car battery is depended on the type of battery, the amount of voltage it has, the fluid level, and the type of vehicle it is in.  

When your battery is empty, it weighs less than when it is full. The electrolyte solution inside the battery contributes to its weight. The battery will lose weight as this solution evaporates. Here are a few different types of batteries and weights for your reference: 

Standard batteries 

This is the most common type of battery found in cars, trucks, and SUVs. A standard car battery weighs between 30 and 60 pounds on average.  

Lightweight batteries 

Lightweight batteries are commonly found in small cars and electric vehicles. They can weigh from 10 pounds up to 25 pounds. Sometimes more than 25 pounds. Know that a lightweight battery is capable of powering a car efficiently. Lithium is lighter than aluminum, but a lithium-ion battery still has enough power to run a small vehicle. But make sure you research before buying one, as your car has to be compatible with the battery’s power efficiency. 

Electric car batteries 

Electric car batteries do more than just start your car and keep the voltage stable. Electric car batteries are also the primary source of energy for electric vehicles. As a result, electric car batteries can differ from model to model. The average electric vehicle battery weighs around 1,000 pounds. However, it can get up to 3000 pounds.  Know that the weight is determined by the battery’s size, type, and manufacturer. 

Hybrid car batteries 

Hybrid vehicles have two batteries: a standard 12-volt starter and an electric battery from which they can draw energy. The starter battery could be lead-acid or lithium-ion, weighing between 26 and 41 pounds on average. The electric battery is much heavier but varies from model to model, as with other electric car batteries. The range varies from around 50 to 120 pounds. 

Heavy-duty car batteries 

A heavy-duty car battery can handle massive amounts of work while remaining undamaged. Heavy-duty car batteries can be found in buses, large trucks, tractors, and other vehicles that require powerful batteries. The size and weight of heavy-duty batteries vary. Tractor batteries, for example, weigh between 25 and 60 pounds, while bus batteries weigh between 130 and 190 pounds. 

What contributes to the heaviness of a battery? 

Several factors contribute to the weight of a car battery. First and foremost, the battery’s contents are substantial. Lead is a heavy element that significantly adds to the battery’s weight. As a result, other batteries are frequently much lighter. 

 The battery’s dimensions also add weight. A battery with more cells will contain more materials, increasing its weight. The weight is also affected by whether or not the battery is fully charged. A depleted battery weighs less than half as much as a fully charged battery. 

Weather protection, plastic usage, and the: of batteries (for electric cars) are other factors that add to the battery’s weight. 

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Are heavier batteries more efficient? 

No, not always. If we’re discussing the same size battery, a heavier battery will almost certainly be less expensive and more readily available in your town. However, lighter-weight batteries are preferable in terms of longevity, cold-cranking amps, and overall power. The only issue here is cost, as lighter batteries will be more expensive and difficult to find for the average consumer. 

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