How To Fix A Dead Cell In A Car Battery?

Dead cells in a car battery can be a very costly problem to fix. I’ll show you how to find a safe way to fix a dead cell without blowing your whole battery up.

When the car battery dies, it’s a big problem. You need a new battery and if you don’t have a replacement, you need to get a jump starter or other emergency power source to start the car.

What you might not know is how to fix a dead cell in a car battery? In fact, you can fix any type of battery, including a laptop battery, and this guide will walk you through the steps.

Different Steps To To Fix A Dead Cell In A Car Battery:

Most of us have experienced the frustration of a dead car battery. You’ve probably already tried many things to fix it, but you keep getting the same results.

In this article, I’ll share a simple and easy way to revive a dead car battery, which will help you get rid of the problem once and for all. It’s a technique that any mechanic should know, so don’t forget to save yourself the hassle of replacing your dead battery and spend less time at the car dealership.

STEP 1. Know What Your Battery Is Made Of:

Car batteries contain 6 different types of cells, and they all need to be replaced at the same time. Each type of cell has a specific voltage, and when the battery runs low, the voltage in the battery decreases. If any of these cells are dead, they will stop producing voltage, and the battery will begin to lose power. The cells that are going bad are usually the ones at the bottom of the battery because they’re closest to the terminals.

STEP 2. Check Voltage First:

You should first check the voltage on the cells that are showing signs of life. If it’s under 12 volts, you can try using a jumper cable to connect the terminals on the positive side to the negative side, then do the same on the negative side to the positive side. If you still don’t have enough power, you can try putting a small wire or battery across the terminals to increase the voltage.

STEP 3. Disconnect the Batteries:

If you’re having trouble getting any power at all, you’ll have to disconnect the batteries. This is where it gets tricky. You want to make sure you disconnect all the cells at once, otherwise, you could blow your whole car up.

STEP 4. Remove the Battery;

The first thing you’ll want to do is remove the battery from the car. This is usually as simple as removing the negative terminal connector, but make sure to follow the instructions on the packaging.

STEP 5. Disconnect the Negative Terminal:

Next, disconnect the negative terminal from the car battery. If you are unsure of how to do this, just go to your local auto parts store or look online. They should have instructions.

STEP 6. Cut the Positive Connector:

The next step is to cut the positive terminal. This is usually a piece of metal that looks like a key. To make sure you’ve got it right, touch it to the positive terminal on the car battery. If it doesn’t feel like it’s connected to the battery, you can remove it and try again.

STEP 7. Replace the Battery:

Once you’ve cut the positive terminal, you can now insert the new battery. Make sure you’ve got it right and that the positive terminal is touching the positive terminal on the car battery.

You can start searching for replacement batteries. Don’t worry about finding the exact same type of battery that you had. Just make sure you get a 6V type that matches the voltage of the cells that are still alive. You’ll need to replace them all at the same time, so you’ll want to order them ahead of time.

STEP 8. Reconnect the Batteries:

After you get the new batteries, it’s important to reconnect them in the correct order. The positive side goes to the positive side, and the negative side goes to the negative side. If you didn’t do this properly, your car won’t work.

STEP 9. Test the Car Battery:

Once you’ve replaced the battery, you can test it with the car starter. If it’s still dead, you’ll need to get a jump starter or another power source.

STEP 10. Let It Rest:

Once you’ve reconnected the batteries, it’s time to let them rest. You should wait a few days before testing it again. If it’s still dead after that, you’ll have to replace the battery again.

To Sum Up:

I know it’s hard to imagine a dead car battery being a big deal, but it is. You don’t want to take your car into the shop to get it fixed and then have to spend more money on a new battery. So when the battery dies, I recommend using a car battery charger to find a safe way to fix the problem.

I’ll walk you through the process of finding a safe way to fix a dead cell in a car battery. Have you ever fixed a dead cell before? What are your thoughts? Please share your comments below.


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Yusuke Kohara
By Yusuke Kohara

Hi, my name is Yusuke Kohara. I'm a research scientist with 20+ years of experience in the battery industry. My knowledge and expertise has been applied to power electric vehicles, mobile electronics, and more! I am also a true car enthusiast. It’s not just about cars for me - it's about all things automotive! I enjoy helping others find their perfect vehicle by providing detailed buying guides as well as reviews on different types of batteries from various manufacturers across the world.


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