How to Charge a Car Battery Without a Charger

One of the worst moments of driving a car is the sudden failure that never gives an earlier alert before it happens one of them is when you came to take your car and you are too late for your work or a meeting, and finds that your vehicle doesn’t start you try to turn the key but there is no hope, the first glimpse that pops in your mind that there no fuel, or dead battery, you have to know what you can do in this embarrassing moments that and how to handle this situation in order to get your vehicle up and running.

How to charge a car battery without a charger

In this guide, we’re going to figure out what it means by having a dead battery the symptoms of it, and how to diagnose it like an expert and how to charge a car battery without charger using any possible element around you.

Having a battery in your vehicle is an essential part of it because it supplies needed current to the vehicle and the main purpose of having a battery is to feed the starter motor which starts the engine, once your engine running the electrical systems of the vehicle is supplied through the battery being charged with the alternator.

So getting your battery dead means that you wouldn’t be able to start your vehicle normally also any electrical system connected to the car is also dead so here are some techniques to awake your battery without a charger.

how to charge a car battery without a charger or another car

Jumpstart your car

This means get your battery up and working using the power of the other battery through a jumper cable, you don’t need many tools or deep mechanical knowledge to get this job done important thing is to pick a good set of jumper wires, jumper wires usually come in a variety of lengths ranging from 10-20 feet, but never prefer the longer ones because the longer the cable the more energy might be lost, so the shorter ones may be better, another tip helps you choose the right jumper cables is the thickness of the cable the thicker the cables the stronger they are trying to choose gauge 6.

Some safety tips are also something you have to know and keep in mind, you should consider all safety risks before performing any maintenance or repair in your vehicle, first make sure that there are no children near the working area, take a moment to read the user manual of your car to know if there is an additional step in jumping start your car, you should be careful of electric shocks when you handle jumper wires once you connected them to the cars you should not touch metal clamps it is also recommended to wear protective glass and gloves

Now all you need is to Learn How to Start Jumping Your Battery with Another Vehicle

Step 1: Park the vehicles next to each other, set the gear to the neutral mode and apply the parking brakes on both vehicles with keys removed.

Step 2: Open the hood of both cars and locate the battery and try to figure out the positive and negative terminals, positive is usually labeled with (+) and has a red cover, negative terminal is labeled with (-) and have a black cover, take seconds to identify the terminals and differentiate between them and if the terminals are dirty Clean them with a cloth or a wire brush.

Step 3: Attach red cable to the (+) ve terminal  of the dead battery, make sure the connection is solid by wiggle the clamps until firm attach, attach the other end of the red cable to the positive terminal of the working battery

Step 4: Now from the working battery end attach the black cable to the negative (-) terminal, then walk over to the car with the dead battery and attach the other end of the cable to any unpainted metal part or any clean nut on the engine block to ensure safe jumping.

Step 5: Now you’re ready to attempt the jump-start by starting the working vehicle and wait a minute or maybe longer depending on the other car condition

Step 6: Try to start the dead vehicle, if it doesn’t start trying to give it some more minutes before trying again, after starting your vehicles try to high up the rpm this may speed up charging a dead battery.

Step 10: Once the dead car is running then disconnect the black cables first then the red ones and be careful not to touch each other

Step 11: Take the vehicle for a short drive this helps to build upcharge, and let alternator charge the battery to make sure the battery doesn’t die again when turning off.

After this process, if your car battery will not charge so you can try with the battery charger. If you have seen still car battery not charging with a charger, so you should go the battery expert mechanic.

Charge a car battery with a wall outlet using home inverter

Using a home inverter to charge up your car battery isn’t very well known method and required some more equipment you shouldn’t use this method frequently you can use it once in a while

Inverters are the electrical device that used to convert alternate current (AC) that provided from a wall outlet to the direct current (DC) that is supported by car battery here is how to apply this method

Step 1: The first thing the inverter should be disconnected from the power supply before setting up connections, connect the negative port of the battery to the black wire of the inverter, and the positive port should be connected to the red port of the positive port of the inverter

Step 2: double-check the connections and make sure that it is as above, then plug the inverter to the power outlet.

Step 3: the high power supply that coming from inverters may charge the battery from 1.5 to 3 hours, this easy method should only be used when you are in a hurry.

You Can Learn More By watching the Below YouTube video

Frequently Asked Question (FAQ)

Can a completely dead battery be recharged?

Yes, a completely dead battery can be recharged using many ways such as jump-start your car, using chargers or using wall outlets with inverters.

How do I charge a car battery with a wall outlet?

Yes, using inverters to convert the AC current to DC that comply with car batteries

Can you charge a battery in the car?

Yes, by plug the charger in the car and let it do its job, it might take some time depending on the capacity and technology of the charger.

How long does it take to recharge a dead car battery?

The speed of charging depends on the result that you want to acquire because fast charging may damage the battery cells, the best-case scenario is long time charging on low Amps, usually standard car charger giving 4-15 amperes but for maintenance usage for dead battery 2-4 amperes it will take 24 hours to fully charge.

You May like: How Long Does it take to replace a car Battery: All that you need to know 

Does AutoZone charge batteries for free?

Sure AutoZone can charge your battery for free while you are waiting, they have dura last fast chargers that can charge your 12V battery in 30 minutes.

Watch YouTube How to charge a car battery with a charger

Final Words

You have to keep in your mind that this situation usually strikes you when you’re in hastiness, so make yourself ready for this kind of situations by keeping the charging gear with you whenever you go because it may get you saved from many bad situations, and be careful when dealing with batteries because making short circuit wiring connections may be led to system failure and burnt chips, so if you confused something or having any doubts working with it you have to seek advice from some expert mechanics or go to the professional garage.

We hope you already understand how to charge a car battery without a charger safely. If you have any quarries or observations no hesitate just let us know our expert teams will guide you better understand.

Tito

Hi There, I am R. Hasan Tito, a mechanic, and owner of this website. My friend and I created this website to share our knowledge, expertise, and experience with our fellow mechanics' community and car users. I am a specialist and certified automotive mechanics (Both Heavy Commercial and Private Cars). I have been working as a mechanic for over fifteen years. I worked for a long time at Global Rebound Automotive companies (Toyota, TATA, BMW, Nissan, TVs, and Others ) as a Mechanic and Mechanics Supervisor.

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