Charging a car battery involves several steps, including:
Dealing with dead batteries is a very common situation you might encounter at any point in your vehicle's lifetime. While you can reach out to a roadside service to help you charge the battery, there are plenty of options for you to do it yourself if you have the proper equipment.
Charging a car battery is not a complicated job and does not require advanced mechanical skill sets. All it takes is to understand how the method is done and be prepared with the right equipment in emergencies.
This article provides you with all that you need to know about charging a car battery. It walks you through the process step by step if you don't have any previous experience. It also highlights all equipment you need to have a backup in your vehicle if you're stuck with a dead battery.
Charging a car battery: a step by step procedure
To charge your car's battery, you need to follow certain steps to help you stay safe and charge the battery successfully in the shortest amount of time.
Before we dive into the details about charging a car battery, you must perform certain steps as preparation.
To charge the battery, you will need a certain source of power. One of the most common sources is the portable charger.
Charging a car battery is not like charging your phone. For example, some car batteries might be sitting in a certain tree, which means that you must take them out to charge them. Other batteries are OK to be charged in the same location.
When the user’s owner’s manual is a great reference to determine whether you need to remove the battery or keep it in place when charging it.
Once the battery is ready, the next step is to turn off all electronics. When charging the battery while electronics are still sucking charge from the battery, this will cause an electrical arc, which is not a desirable situation.
Once all electronics are turned off, the next step is to disconnect the battery cables. Disconnecting the cables should be done in a certain order to prevent any risky situations.
Refer to your vehicle's owner’s manual to understand which cable is which. The manual will tell you that the black cable is usually the negative or round table. It will also tell you that the red cable is the positive one. Some vehicles might not have color-coded cables, and instead, they will have a negative sign for the negative cable and a positive sign for the positive cable.
Start by disconnecting the negative cable first and ensuring it stays away from the positive cable to prevent any charge transmitted between the two. Then, you can go ahead and disconnect the positive cable and consider keeping it away from the negative cable once you disconnected.
Some vehicle's batteries might have a plastic cover on the terminals where you must remove them first to disconnect the cables. If you've not disconnected a cable before, the process should be simple, and it just takes a socket wrench to loosen the cable and then gently disconnect it from the battery.
Before you charge your car's battery, it's always a good habit to clean the terminals and prevent any malfunction soon.
To clean the terminals, you can either use a commercial solution designated for battery terminal cleaning or mix baking soda with water to create your solution.
It's important to thoroughly clean the terminals and not leave any residual debris, dirt, or corrosion. The cleaner the battery terminal, the easier it is for the charge to run smoothly without disturbances.
After completing all previous steps, it's the right time to start connecting the charger and getting the battery charging process started.
To do so, you need to follow these steps:
After charging the battery completely, you will need to disconnect the charger. Keep in mind that you cannot touch the charger unless it's powered off, and some charger might tell you when it's safe to touch them.
If you notice that the car's battery cables are not in good condition, you might need to replace those as well. Remember that you have to replace the positive cable first and then replace the negative one.
How long does it take to charge a dead car battery?
It all depends on the battery size and the charger's power. Usually, charging a completely dead battery takes up to four hours. However, certain situations might take you up to 24 hours to charge the battery.
To get more accurate estimates, you need to understand how big your battery and how much power the charger provides you.
Can a completely dead battery be recharged?
Yes, if your car's battery is completely dead, you can always recharge it. However, keep in mind that any internal components like the alternator will not recharge the battery because it's not designed for this test.
You will need an external source of charge like a portable charger and follow the instructions mentioned in this article.
There are other methods to get your vehicle started without needing the battery, including a jumpstart. To jump-start a car, you will need a jump cable, and you will need a source of power from another vehicle. Jumpstarting the car should be done in a certain way, and we've highlighted this way in detail in a separate article before.
Do you put the positive or negative on a battery first?
Order matters a lot when it comes to connecting and disconnecting positive or negative cables. You always want to connect the positive first and then the negative. If you are disconnecting the cables, start by disconnecting the negative and then the positive.
The whole idea is that you don't want the battery to be connected to the negative cable only at any point.
Do I need to charge my car battery after a jump start?
Remember that the jumpstart does not necessarily charge the battery; instead to, it skips the battery's role and gets your vehicle ready to go. Therefore, once you jump-start the car, allow the vehicle to run for at least 30 minutes to charge the battery.
If you did not allow the car to charge the battery completely, you might end up with the same situation needing another jumpstart once you turn off your vehicle.
Can you leave a car battery charger on overnight?
Yes, there are situations where you can leave the car battery charger on overnight. However, you need to know when to check back on the charger to avoid overcharging the battery.
If you're using a slow charger, it might make sense to leave the car charge overnight because it might take you up to 24 hours in some scenarios.
How do I bring my car battery back to life?
There are plenty of ways to bring your car's battery back to life, assuming that it's restorable. In other words, if the battery itself is not in good condition, it might be the right time now to replace it.
Assuming that your battery is not in a terrible condition, you can either use a jumper cable to get your vehicle started so that it can charge the battery, or use a portable charger and follow the method we highlighted in this article.
It's also important to check the battery cables and the battery terminals to ensure they're all in good condition. No matter how you take care of the battery, if these connections and terminals are not working properly, you won't get your vehicle started. You can't take advantage of the battery.
Conclusion
Car batteries are not designed to last forever, and there will be a point of time where they don't hold a charge, or they might die requiring some recharge. However, charging a completely dead battery is not a complicated process if you have the necessary toolsets.
This article provided you with a simple procedure for charging a car battery using a portable charger. To do so, you need to prepare all necessary toolsets, get the battery ready, disconnect the battery cables, clean the terminals, connect the battery with a charger, allow the battery to charge for a designated time frame, and disconnect the charger.
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