How Much Does a Car Battery Weigh?

Every car needs a different power output, battery size, and more. Therefore, every car battery will have a different weight. The average weight for a 12V lead-acid battery is 41 pounds. Batteries may weigh more or less depending on their size, BCI group, and age.

Why Do You Need To Know The Battery Weight?

Knowing the weight of your car’s battery is essential. When you need to replace the battery, you’ll have to choose one with a similar weight as the original. Knowing the battery weight can help you choose the right replacement battery for your car. 

There are a few reasons why the weight of the battery is important when choosing a replacement. The weight of the battery can affect your car’s performance. Weight often determines performance, as well as power capacity.

A larger vehicle won’t have as much power as it should if the battery doesn’t meet the minimum power requirements. Frequently, the weight of the battery directly affects the power it puts out. Choosing a battery with the same weight as the factory battery can help your vehicle perform better.

Another reason to know the weight of your car battery is for replacement purposes. Making sure you can lift the replacement battery is an important replacement preparation step. Though 40 pounds is the average battery weight, some batteries can be heavier.

A car battery’s weight depends on how big it is. Here is a chart of car battery weights according to their group sizes:

VehicleBCI GroupWeight
in kg
in pound
Honda AccordGroup 4715.935520
Toyota RAV4Group 3517.739650
Subaru ImprezaGroup 26R12.828.4715
Toyota CorollaGroup 24F20.445885
Ford ExplorerGroup 6520.244.6750
Ford FocusGroup 4821.246.7760
Chevrolet ImpalaGroup 94R24.353.6850
Honda CivicGroup 5112.227435
Chevrolet MalibuGroup 94R24.353.6850
Nissan AltimaGroup 94R24.353.6850

Note: Affiliate links (‘’BCI Group’’ column) open in the new windows, feel free to click them for up-to-date prices and offers.

Why Are Car Batteries Heavy?

Car batteries are heavy because of what they are made of. Most car batteries are still lead-acid batteries. This means that inside the casing is a mixture of lead and a water-based electrolyte solution. While this solution makes the battery heavy, it’s still the best power source for most cars.

However, there are alternatives to lead-acid batteries. Here are a few examples of alternative battery options:

Lithium Batteries: These work best in electric or hybrid-electric cars. They are lighter than lead-acid batteries, and they are more efficient.

Unfortunately, lithium batteries can also be much more expensive than a standard car battery. There may be certain safety issues associated with lithium batteries as well, especially at lower temperatures.

LiFePO4 Batteries: This is another type of lithium battery. They have a longer life cycle, meaning they can last longer than a lead-acid battery. Much like other lithium batteries, they weigh less than a standard battery, but they are much more expensive.

How To Determine The Weight Of A Car Battery

There are a few ways that you can determine the weight of your car’s battery. It’s not always possible to weight the battery by itself, so one of these other methods is best.

Check Battery’s Label or Packaging

First, you can check the label or the packaging on the battery. The label will usually tell you how much the battery weighs in pounds, as well as other important information. If the label has been worn away, you can always check the car’s owner’s manual. Usually, there is information about the factory battery in the owner’s manual.

Checking The Battery Size

Alternatively, you can guess the weight of the battery based on the size. In the chart above, you can see that each BCI group has a similar size and weight. Checking the BCI group of your battery against the standard size can help you determine the battery’s weight.

The size of the battery can also tell you how much it weighs. The bigger a battery is in size, the heavier it will generally be.

It is important to consider age if you choose to weight the battery. A new battery will be significantly heavier than a battery that has been in a car for several years. If a battery is dead, it will be lighter than a new battery.


It’s clear that the weight of your car’s battery is very important to your car’s performance. When replacing your car battery, considering the old battery’s weight is key to choosing the best new battery. While there are other factors at play, the battery’s weight is a good place to start.


How much does a car battery cost?

The cost of a car battery depends on the quality. A standard lead-acid car battery can cost between $50 and $120 depending on the size and group.

Premium lead-acid batteries may cost up to $200. Lithium car batteries can cost up to $1700 in some cases.

How long is a car battery lifespan?

The average lead-acid car battery is expected to last between 4 and 6 years. There are other factors that determine how long a battery will last. The weather, what type of vehicle you drive, and your driving habits can all affect the life of the battery.

What are the signs that your car needs a new battery?

Your car will tell you when the battery needs to be replaced. Dim headlights and other electrical issues could be a sign of a failing battery.

If the engine is slow to start or crank, it might be time to check the battery charge. If you hear a clicking sound when you turn the key, a new battery is probably in your future.

Read more: How to Reconnect a Car Battery

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