To change the battery in your car, you must have a 10mm open-end wrench.  The battery cables always use 10mm nuts. The battery bracket typically uses a 10mm bolt, but some battery brackets are held in place with a 12mm or 13mm bolt.

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Like a professional, you may need a few extra tools to change the battery.

With these tools, you can change the battery in virtually any car. Of course, a few cars out there need specialty tools.

	10mm 3/8 Drive Socket
	3/8-inch Drive Socket Extension Set
	3/8-Inch Drive Quick Release Ratchet
	Battery Terminal Cleaning Brush
	Battery Terminal Dielectric Grease

Now, look more in-depth at the tools you need to replace a car battery yourself.

How to use these tools

Let’s take a look at how you would use these tools to change a car battery.

Battery Terminal Brush

You will need a battery terminal brush to scrub the corroded battery terminal. Just insert the brush and twist the clean your battery positive and negative clamps.

 

Make sure to clean the battery post as well.

 

10 mm Combination Wrench or Socket

Before removing the battery and cleaning it, you need to loosen the 10 mm nut. The nut doesn’t need to come off; you must get it loose. Once you loosen the 10 mm bolt on the negative and positive battery bracket, you can remove the battery clamps.

You can also use a combination 10mm open-end wrench to loosen the bolt.

 

Tools to remove battery bracket

Depending on how your battery is mounted, you may need one of the following:

Removing batteries that have the bracket on top

 

Most Japanese cars such as Honda, Toyota, or American cars such as Ford, Chevrolet, and Dodge have the battery secured with a bracket on top of the battery. These batteries are easy to replace. Remove the 10 mm that holds the bracket in place. Remove the bracket and pull out the battery.

Removing batteries that have a side bracket

 

In many European cars such as BMW, Mercedes, Audi, and Porsche, the battery is held in place with a bracket at the bottom of the battery. The bolt for the bracket is typically either a 12mm or 13mm bolt. You will need an 8″ extension and a ratchet to get to this bolt, which is down, and usually, there isn’t much room for your hands.

Dielectric Grease

It is highly recommended to use dielectric grease to protect the battery terminal from corrosion and improve the connection.

Where is a car battery located?

The most common locations where you will find a car battery are:

• The engine bay
• In the trunk
• Under the rear seat

When replacing a car battery, which terminal do you disconnect and connect to first?

When removing the battery, start by disconnecting the negative terminal first. Then disconnect the positive battery terminal.
When connecting the battery, connect the positive terminal first. Lastly, connect the negative battery terminal.

How difficult is it to change the car battery yourself?

Changing a car battery is relatively easy. Changing the car battery is straightforward even if you don’t have much experience fixing cars; it is one of the easiest repairs you can do yourself.

How long does it take to change the battery yourself?

It takes about 15-25 minutes to charge a car battery.

What should I keep in mind when changing the car battery myself?

Always disconnect the negative terminal first. Never short between the positive battery terminal and the car’s body or the Negative terminal. If you do this, you will create sparks and may even damage electronics or the battery. Most importantly, you may cause injuries to yourself.

Can I replace the battery for free?

Yes. Most stores that sell batteries will install them free of charge. For example, Advance Auto Parts and Autozone will install the battery for free if you buy a new battery from them.

We hope you find the What Tools You Need to Change a Car Battery guide helpful. Check these troubleshooting and repair guides for more help on your vehicle.