Can I Put a Bigger Battery In My Car?

Once a battery can properly sit in your vehicle’s battery chamber and it has the required cold cranking amp for the vehicle it should work. However, modern carmakers are keen on dimensions. They have a small battery compartment so a bigger battery may not just physically settle in. Even if it does there may be some rising challenges from using a battery of an inappropriate size for your vehicle. 

For one the battery terminals may touch the hood thus affecting its functioning and causing it to frequently drain. Plus, if someday the battery dies out for any reason the alternator has to work harder to bring it to life. Besides, a bigger battery is not a guarantee for longer life or more power to your vehicle.

Car Battery Size

When out on a battery purchase to alternate your vehicle’s initial battery, you should know your car battery specifications. This is to ensure you wouldn’t buy a bigger size battery or a smaller size battery. A big battery may meet the amp need of your car but may not contain the battery compartment of your vehicle. Hence, you should know your battery’s dimensions before purchase.

Where to Find your Car Battery Measurements

Your motor manual is a good way of knowing the actual battery size of your motor. The battery size is also written on the battery in form of cluttered numbers. These numbers tell you the appropriate dimensions of a new car battery if there is a need for one. You do this to avoid terminals and hood intersections if you also intend to buy a bigger battery.

The internet is also a juicy information space. If you misplace your car manual and could not get the dimensions on the battery, you can look to the internet for assistance. 

Also, on the battery, you will find its cold cranking amp number and its reserve capacity number. It is good you take note of these numbers when buying a new battery. Be sure the new battery CCA and RC suit what the old one has.

When is a Bigger Battery Ok

If the bigger battery can fit into your car battery compartment without problems with the hood terminals and other vitals then your car should be okay. Bigger batteries have their pros too. For one they have higher RC which is good if you love running your car’s electrical accessories for a long period.

However, there are a few things you shouldn’t ignore if you intend to use a bigger battery. First, be sure the new battery has the carmaker’s recommended voltage as expected for your vehicle. Also, ensure the battery snuggly sits in its space and that the battery’s hood and terminals do not intercept.

When is a Bigger Battery Not Ok

If after checking your car’s battery specifications; its compartment fit, power output capacity, and other related info and you see a disparity between the carmaker’s recommendations and the big battery then it is not okay to use. Your car’s alternator may overheat and get damaged faster than usual if it is not compatible with the big battery. Also, you may end up overworking your alternator to keep up with the electrical needs of your car’s extra accessories.

What Effect Do Bigger Batteries Have on Vehicles

It is best to go by the car maker’s prescription when the need for a new battery arises to avoid unnecessary car troubles and to enjoy your vehicle to its fullest. You might assume that a bigger battery means more electrical power for car appliances but you are wrong. The alternator does this job so it is the alternator that will be overly labored and this can damage it with time. 

A bigger battery may also disrupt the inner workings of your car’s computer by disrupting its current flow.

What Battery is Designed for Your Vehicle

If the batteries are of the equivalent description they can be alternatively even when the batteries were meant for other cars. If the battery size suits each other and their cold-cranking amp is in line with one another then you are good to go. Oftentimes, that is a major consideration.

Will A Wrong Battery Size Spoil your Car?

An inappropriate battery can have adverse effects on your alternator and shorten its durability. The alternator may have to labor harder to achieve the electrical requirements of your vehicle and its accessories. This excess labor damages the alternator faster.  

What is the Minimum AMP to Starting a Car?

About 300 to 600 amps are usually enough to jump-start a vehicle with a completely drained battery. The drained battery is linked to a charged one booster cable to cause a jump start. This may scope between three hundred to three thousand amps. However, most vehicles used don’t often need over six hundred amps for a jump start.

Is a battery with a Higher AMP Good for Your Vehicle?

A high cold cranking amp in a battery is good especially during the winter. It helps with starting the vehicle.

How Much Cold Cranking AMPs is Required in a Vehicle

For snowy cold areas, your vehicle needs a higher cold cranking amp than it would in summer regions and places with good heat. Your battery should have at least the baseline cold-cranking amp car manufacturer prescribes. However, you may get a booster when the colds set in.


You should stick to the manufacturer’s battery prescription. Automobile makers know what is best for the vehicles they made. Hence, if a particular size, amp, or other specification is recommended for a vehicle, it is best to stick with it. When shopping for a new battery, the two major considerations are the cold cranking amp and the physical size of the battery.

If these two are okay with the vehicle maker recommendations, then the battery is good to go. Also, when putting the battery in its place make sure its terminals have to intersect with its hood to avoid a spark.