How Heavy is a Car Battery?

March 4, 2023

how heavy is a car battery

When you're buying a new battery for your car, the weight of the battery is an important consideration. Having this knowledge will help you find the best battery that fits your vehicle.

The average weight of a 12 volt battery is around 40 pounds. This number isn't surprising, as lead is 11 times denser than water, so it adds a lot of weight to batteries.

Batteries full of energy will weigh more than their drained counterparts, Smart Motorist explained. The main reason for this is that batteries have an electrolyte solution that is what adds to the weight.

Despite the fact that they are heavy, car batteries are an essential part of any vehicle. They can start your car and keep it running at a constant voltage, so it's crucial to know the right size and type of battery for your vehicle.

Battery weight is also affected by other factors like weather protection, plastic usage and the: of batteries (for electric cars).

Why Are Car Batteries So Heavy?

The first reason for the hefty weight of car batteries is that they are made of lead. This dense metal is very heavy and will add up to more than half of the battery's total weight, explains Smart Motorist.

Another reason for the heaviness of car batteries is that they have to be stored in the engine compartment of your car. This is not an easy task, especially if you need to move the battery out of your car's engine compartment for repairs or replacement.


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