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So you are planning to go out on a drive, and suddenly your car isn’t starting. Having your vehicle’s battery completely dead amid a plan can be exhausting. But you don’t have to panic if you know the proper way to charge a car battery.

The proper way to charge a car battery is to hook up the battery charger’s positive cable to the battery’s positive terminal. Connect the battery terminals with the charging cables. Turn the charger on and set the timer.

This post will go through the full and fledge guide to recharging car batteries and some signs you can identify a dead battery.

Best Way To Recharge A Dead Car Battery

Most of the time, when your vehicle is acting up, there are chances that the battery is the main culprit. There can be days when your car battery is completely dead or needs replacement.

A drive around the corner would be enough for most batteries to recharge them. If the battery is completely dead, you must arrange a car battery charger to charge the car battery. If recharging your car batteries doesn’t work, you then have to jump-start your car batteries using jumper cables.

How Long Should You Charge A Car Battery?

Charging a car battery is one of the easiest ways to fully charge your vehicle’s flat battery.

You can charge your car batteries of around 4-8 amperes for about 10-24 hours. If your car battery is completely flat, you might have to consider recharging it overnight. After some time, you can also test the voltage of your car battery to know if the battery is fully charged or not.

Signs That Your Car Battery Is Dying

A lot of you might mistake your car for not starting up for some engine failure or running out of fuel. However, what we forget is that the battery is what kick-starts the engine.

A warped battery case or egg-rotten smell from the battery is a clear indication that your car battery is dying. Some other common signs of a car battery dying include; corrosion on the connectors, frequent jumps, electrical issues, or a slow starting engine.

Things To Do Before Charging A Car Battery

Charging a car battery involves electrical components, so it is important to handle the process carefully. Even though the chances of getting electrocuted by a car battery are less, you still have to remain on the safer side.

Before you begin charging a car battery, turn off all the electronics in your car, including the radio and interior lights. Have your safety gear, like eye protection and gloves, at hand, and don’t forget to refer to your owner’s manual for instructions.

How To Charge A Car Battery?

Here is a step-by-step guide on how to charge a battery.

Selecting A Battery Charger

To charge a car battery, you need to use a trickle charger. It comes with an electric cord and two jumper cables. A trickle charger will recharge your car battery from a power outlet at a slow pace to hold the charge for a longer time.

Clean The Battery Terminals

Check the battery terminals for dirt, and if there is any, clean it up with a cloth. Also, if the terminals have a white residue, don’t try to touch them with your bare hands. This white residue is dried sulfuric acid and can cause burns on your skin. Using sandpaper or a wet cloth, gently clean the battery acid with a baking soda mixture using a terminal cleaning brush.

Remove The Cell Caps

Many batteries have these cell caps over them. Usually, they are found at the top of the car batteries or under a yellow strip that you must peel down to access the terminals. If you don’t remove the cell caps before recharging your car battery, harmful gases will accumulate in the battery case.

Attach The Charger Cables

Double-check if the car and its interior light are turned off or not. The trickle charger has two charging cables; one is a red or positive cable and has to be connected to the battery’s positive terminal. The other black cable is a negative or ground cable and is connected to the battery’s negative terminal marked as NEG. Be careful that the two wires do not come in contact with each other as they can ignite a spark and release hydrogen gas surrounding the battery.

Turn On The Battery Charger

After the setup, you can connect the charger to an electric outlet to turn it on. Leave the battery overnight to get fully recharged. In the morning, you can note the voltage of the battery using a voltmeter. If the readings are accurate, you can unplug the charger; otherwise, you must wait a few more hours.

Check Out How to Charge a Car Battery – What to Use, How to Hook Up a Car Battery Charger:

How Long Does A Jumped Battery Last?

Jump-starting your vehicle is another technique to charge your car battery. What happens here is that jump-starters give your car an extra kick to get started.

on average, a jump-started battery can last about 3 to 6 years. On the other hand, many vehicles are good to go with a battery for about 5 to 6 years after a jump start. So, the timespan depends upon different factors, including the climate and your usage.

What To Do If The Car Battery Won’t Charge?

There can be many reasons why your car battery isn’t charging. Most of the time, a car battery can work without recharging it for at least five years.

One common reason for your car battery not responding to charge is that the terminals are corroded. Another common reason might be the alternator not working properly. The most you can do here is fix the alternators or wipe clean the terminals.

How To Know if Your Car Battery Needs Replacing?

You need to replace your car battery once during at least five years. Even then, your car battery might work fine if it is not showing odd signs.

The easiest way to know your car battery needs replacement is when the car is taking too long to start. Also, if your vehicle has been sitting idle for a long time and triggers a dashboard light, understand that this is when you get a new car battery.


Does a New Car Battery Need To Be Charged?

No, a new car battery doesn’t need to be charged. When you get a new car battery, it is already charged up to 90% capacity, so there is no need to charge it before its first use.

Which Terminal Do You Connect First On A Car Battery?

Start with connecting positive terminals and then follow it with negative terminals on a car battery. For connecting the new battery repeat the process in reverse order.

What Amps Should You Charge A Car Battery At?

It is safe to charge a car battery at 4 to 7.5 amps. Charging your battery at these amps will let the battery retain charge for longer. Many battery chargers are designed to have them plugged in for a longer time.

How Long Can You Leave A Trickle Charger On A 12 Volt Battery?

Some trickle chargers can be left even for months on a 12 Volt battery. However, it is always better to refer to the owner’s manual for details.

Final Considerations

All in all, you can still manage things smoothly in case your car battery runs out of charge. No, you don’t have to replace the battery altogether, but you need to recharge it using an appropriate trickle charger. If you ever end up with a flat battery while on a road trip, don’t forget you can contact Road Speed Solutions for help.

Agustin is part of the team at Road Speed Solutions, a reliable and efficient roadside assistance business with over a decade of experience in New Jersey.

What sets Road Speed Solution apart is the team's commitment to giving back to the community, regularly donating to local charities and supporting small businesses. Choose Roadside Speed Solutions for prompt, trustworthy roadside assistance services.