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How To Charge My Car Battery

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How Do You Charge A Car Battery

How to Charge a Car Battery | DIY Car Repairs

Providing the battery is not excessively past its expected life cycle, with the right equipment, charging a car battery is not difficult. From this step by step guide you can confidently charge your car battery both safely and efficiently. Remember you should never charge leaking or damaged car batteries.

Voltage Doesnt Matter But It Does

Voltage doesnt start a car amps do. Still, if your battery has low voltage, that means it has low amps, and you need to get it charged.

The best way to break it down is if your battery has fewer volts, then it has fewer amps however, just because a battery has full voltage doesnt mean that it has full amps.

For charging purposes, this doesnt matter too much if the battery has a full charge and still wont start your car, then the battery is defective and needs to be replaced. But if you charge a battery with low voltage, it doesnt guarantee that it will start your car when its charged.

How Do I Keep A Car Battery Charged While In Storage

If your vehicle spends time sitting around not being used, especially during the winter months when you may have declared it SORN, a trickle charger may be a better option. It actively monitors the battery’s health and can remain connected for extended periods because it only adds charge when it’s needed.

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Charging Your Car Battery

If you havent been driving your car or its been left sitting idle, you may not have enough power in your battery to start the engine. And while it may seem like a good idea, running your vehicles engine five minutes a day is not enough to maintain your car battery.

To maintain the charge in your vehicles battery you need at least 30 minutes of driving – depending on the vehicle and the battery age. However, we recommend using a battery charger. With a fully automatic charger, it can be fitted to maintain your pride and joy or, used as a normal battery charger. Charge every two weeks and youll extend the life of your battery, restore battery performance and minimise the chances of breaking down.

If youre after a battery charger, or a battery for your car – the NRMA are here to help. Simply call .

The Proper Steps: How To Jumpstart A Car

Disconnecting a car battery over a long holiday: should you do it?

Surely, you will get a drained battery when you go for an extended vacation without your car, or leave your headlights on. So you have to know how safely and properly jumpstart a vehicle because its effortless to work, and you do not need to hire any technician.

Step 1: Open Up the Hood

First of all, take the ignition keys for both cars. Then, open the hood and clean all the dirt from there. Check the battery position for both cars and find the red positive and negative terminal.

The positive red cables will be red and the negative are black. Different colors play a vital role in understanding connecting positive and negative battery terminals. Also, check carefully for the complex sections like car AC compressors, carburetors, and others while checking stuff.

Step 2: De-Tangling the Cable

Now take your jumper cable and hold red and black cable each hand. Detangle the wire so that you can connect them easily.

The jumper cables should be connected so that it wont end to touch each other. Also, the donor battery should have enough voltage and matching voltage system.

Step 3: Connecting the Red Cables with Dead Battery

Take one side of the jumper cables, like the red cables, which are red positive. Now attach it to the positive side of the dead battery.

The need for a better cable is important in any kind of situation, whether you want to wake up the dead cells of double the winch battery power. You need a solid connection.

Step 4: Connecting the Black Wire to the Dead Cell

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Using The Cars Alternator

You can use your cars alternator to charge your battery whenever the engine is running. The alternator has a set of magnets in it that surround a coil. The engine turns the alternators rotor shaft , and these spinning magnets generate an alternating current.

The alternator has a rectifier in it, and its job is to convert that AC into direct current, which then powers the electric stuff in your car.

It also recharges your battery with that DC, so if your alternator goes bad, your battery cant recharge. Start your car a few times with a bad alternator, and eventually, the battery runs out of juice. With a working alternator, you charge your battery with it simply by running the engine.

How long does it take to charge a battery with the alternator?

As with most questions, the answer could start with It Depends. Because many factors come into play when determining how long a battery will take to charge. Like the type of battery, how dead it is, the type of charger, battery size and battery capacity.

There is a lot of fancy math you can do to figure this out since most alternators output between 13.2 and 14.8 volts while running. A fully charged battery will be around 12.5 volts. Add, divide, multiply and do a little dance and you can get close to 15 minutes for a mildly low battery.

For a battery that is really discharged, it can take up to 30 minutes to fully charge it using the alternator. Of course, your car has to be running the whole time.

What To Do If A Car Battery Wont Hold A Charge

If your battery isnt holding a charge, you will need to get a replacement. Before having it towed to your local automotive shop, try a new battery. If you face the same problems after replacing the battery, it could be possible that isnt your problem at all. In fact, many people replace the car battery only to find out that the alternator was defective, leaving the battery with no way to charge.

Ask any car question in our new community!

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How To Charge A Car Battery With A Portable Charger

A portable car battery charger is the charger that you carry on your car, and using a portable charger you can recharge your car battery anywhere and anytime.

The portable charger is different from a typical battery charger. The Portable chargers dont need to be plugged in a household outlet or anywhere to recharge the battery because it holds the charge.

Here is how to charge a car battery with a portable charger:

In order to charge your car battery with a portable charger, you have to have a portable battery charger, jumper cable, drivers manual and safety gloves. Do not skip the safety measures to charge a car battery.

Charging Times With Different Battery Chargers

How to Charge a Car Battery

Different car battery chargers give different amounts of power, so the charging time of a car battery will depend a lot on this. For sure, it takes a different amount of time to charge different types and sizes of batteries also, but there are times for a normal-sized car battery around 62 Ah.

Here is how long it takes to charge a car battery:

  • 2 Amp charger: 24 to 48 hours
  • 4 Amp charger: 12 to 24 hours
  • 10 Amp charger: 3 to 6 hours
  • 20 Amp charger: 2 to 4 hours
  • 40 Amp charger: 30 minuter to 1 hour

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How To Charge A Car Battery With A Charger

The battery is an essential part of every vehicles electrical system. It lets the engine start, providing power, or, as the phrase goes, juice for the electronics, voltage regulator and alternator.

Being properly maintained, the accumulator can last for not less than 3-5 years, operating until the very end of its Calendar life. Poor care and maintenance can enable corrosion on the terminals that destroy the connections, a short circuit, lack of water, alternator damages.

Additionally, the knowledge about how to charge a car battery with a battery charger is quite essential. The battery can die if you leave the vehicle idle outdoors for a long time, especially in winter, when its extremely cold. If you forget to turn off the lights before leaving your cherished vehicle in the garage, it can become a negative factor, as well.

  • refill the accumulator with the electrolyte or distilled water.
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    How To Charge A Car Battery

    Sooner or later, most drivers encounter the inevitable inconvenience of a dead car battery. You dont need to be an expert auto mechanic to know that without a running battery, your car wont start at all. Youll have to call a roadside maintenance service or find a way to get your vehicle to a repair shop in this situation. Both of these options are less than ideal.

    Alternatively, you have the option of avoiding these choices and charging your car battery yourself. So long as you have the proper equipment, like a portable battery charger, you can perform this task anywhere you need to, even when youre stranded on the side of the road.

    Lets break down how to charge a car battery.

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    How To Charge A Car Battery Depends On How Dead The Battery Is

    Its important to know just how dead your cars battery is before you decide how to recharge it. A healthy battery will show 12.4 to 12.7 volts across both terminals when measured with a voltmeter, a handy device for diagnosing battery issues.

    If the voltmeter reads lower than 12.4 volts, youll likely run into problems when trying to start your vehicle. How much lower will determine what method you should use to charge the battery after jump-starting your vehicle.

    Knowing How To Charge The Battery Could Get You Moving Again When Your Car Won’t Start Be Prepared By Reading Our Quick Guide To Recharging

    How to Charge a Car Battery

    Flat batteries have been a particular problem over the past year, following the series of Covid lockdowns and travel restrictions. Thankfully, recharging a car battery is straightforward but there are some important things to remember first.

    A car battery should last between three and five years before it needs replacing. There are many signs that a battery is getting old, but common symptoms include the engine cranking more slowly than normal, loss of power to the electronics and a warning light on the dashboard.

    Charging a failing battery might get you home, but you should fit a replacement as soon as possible. A battery in good health might last around two weeks before it needs recharging, but external factors can reduce this to a few days. Cold weather and extreme heat are two examples, or it could be something as simple as an interior light left switched on.

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    Here’s How To Recharge Your Battery

    First, find your vehicle’s battery and locate the positive and negative terminals. Most cars have their battery under the hood. The positive terminal is marked with a “+,” and the negative terminal is marked with a “-.” Sometimes the terminals are protected by plastic covers that need to be flipped out of the way, so you can charge the battery.

    Next, make sure your battery charger is unplugged from the wall socketit uses household current to charge the batteryand that it’s switched off, just to be doubly sure there’s no current flowing through it. Read the instructions that come with the battery charger, as each charger operates a little differently.

    Attach the charger’s red clamp to the battery’s positive terminal and the black clamp to the negative terminal. Give the clamps a little wiggle to ensure that they have a good connection to the terminals. For the greatest safety, keep the charger as far away from the battery as the cables allow.

    When the battery is fully charged, shut off the charger and unplug it. Then remove the cables, unhooking the negative clamp first.

    How Many Volts In A Fully Charged Car Battery

    Most modern vehicles have a 12 volt battery underneath the hood. A 12 volt car battery contains six cells, each of which will contain 2.1 volts of power when fully charged. So, when the engine is off, a car battery is considered fully charged at 12.4 to 12.6 volts.

    When your battery’s voltage drops even a small amount it can make a big difference in its overall performance. For instance, a voltage of 12.1 volts means your battery is operating at only 50% of its total charge. Once it drops down to 11.6 volts, the battery is almost completely discharged.

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    How To Jump A Car Battery

    Be sure all accessories are off and the lights, including the interior light, are off. If you have anything on, it could cause the battery to arc while you are working with it.

    Once you get down to the battery, remove the negative or ground cable first. This is always the black cable unless someone replaced the cables with the wrong colors. If you look on the top of the battery, you can see which is which the ground cable will have a negative sign and the power or positive cable will have a plus sign.

    Clean the battery terminals with a terminal cleaning brush and a mixture of baking soda and water to neutralize the battery acid. If the battery terminals and posts have a lot of acid buildup, wear eye protection and a mask so the airborne corrosion does not contact your eyes, nose and mouth. Dont touch your face until after youve washed your hands.

    If the battery has removable caps, carefully pry the caps off and check the level of the water. If any of the cells looks low, add distilled water only and take care to not overfill the battery. Most batteries today are maintenance-free so you wont be able to open them to check the acid level.

    Remove And Verify Power

    How To Charge Your Car Battery

    After about 30 minutes, remove power from the battery by releasing the negative clip first and positive clip afterward. Use your multimeter to verify the batterys voltage without the load.

    Its not necessary to charge the battery up to 12 volts. Overcharging might be part of the scenario. Its best to charge it to a partial state so that no harm to the battery or yourself occurs.

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    How Can Mach1 Services Help When You Have A Dead Battery

    Mach1 Services provides a technologically advanced way to get roadside help fast. If you find yourself stranded with a dead battery, Mach1 Services will be there to help in an instant. By simply downloading the free Mach1 app, you can find the closest service provider to you by phone.

    Mach1 will alert whichever worker is nearest to you, provide you with a run down of price of service dependent on region, and, through the use of an advanced GPS system, will allow the service member to find you quickly.

    Mach1 does not require a membership, and the service can be paid for by credit card or debit card directly through the app. When you request help, the Mach1 app will immediately notify the closest service member to you. Plus, the app has a 24/7 phone service that will connect you directly with Mach1.

    Seven Steps To Jump Starting Your Car

    When you jump start a car, youre using external electricity to recharge a flat battery enough for you to switch the engine on.

    The most common method of jump starting a vehicle requires you to have jump leads .

    Heres a simple seven-step process to jump start your car safely:

  • Position the car with the working battery close to the car which is flat so that the jump leads can reach both vehicles batteries, taking care to move metal objects out of the way and get rid of any loose clothing and jewellery which could cause it to short-circuit and generate a nasty zap.
  • Connect the first lead first, make sure the engine of the working car is switched off and attach the red jump leads crocodile clip to its positive terminal, before attaching the other end to the positive terminal of the dead battery in the other car.
  • Connect the second lead attach the black jump leads crocodile clip to the negative terminal of the working cars battery, then attach the other end to an earthing point away from the flat battery and fuel system.
  • Wait for a few minutes and then start the engine of the working car, letting it run for a minute.
  • Once this time has passed, start the engine of the car with the flat battery and let both cars run for 10 minutes.
  • Turn off the engines of both cars and disconnect the jump leads in reverse order to how they were attached Make sure the leads dont touch one another in the process.
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    How To Charge A Car Battery Without A Charger

    A majority of people know that a car battery is constantly charged by the vehicles electrical system. Theres really no reason to pull the battery out for any other purpose. However, car batteries are also used for other purposes outside of a standard vehicle. Knowing how to charge the battery without a charger is the challenge now. Recharge car battery components with ease by following these simple instructions.

    If Your Car Battery Is Below 12 Volts Use A Dedicated Charger

    How Long does it Take to Charge a DEAD Car Battery

    A car battery is considered discharged when the voltage drops below 12 volts. While your vehicles alternator can keep a healthy battery charged, it was never designed to completely recharge a dead car battery. Using it to try to restore such a depleted battery can actually damage the alternator, which is forced to work overtime to both fill up the battery and supply energy to the rest of the vehicle. You can also hurt the battery by undercharging it this way, making it less likely to keep the charge that the alternator puts into it.

    With a seriously depleted battery, your best option is to connect it to a jump starter or a dedicated battery charger either before or immediately after a jump-start. These charging devices are designed to safely restore a dead battery to full charge. Most of the time, you dont even have to remove the battery from your vehicle.

    Dont take chances with your battery. Using the right recharge method will extend its life and ensure you never get stranded again.

    Visit to browse our full range of electrical system products, or drop by one of our 650 NAPA AUTOPRO Service Centres for routine maintenance and repairs. For more information on how to charge a dead car battery, speak to an expert at your local NAPA Auto Parts store.

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