Car jumper cables

How to Charge Car Without Battery Charger

Car batteries do not last forever and may suddenly run out of charge. When this happens your car may fail to start and the electrical components might stop working. Therefore, the battery is a major component and if you suspect it is dead, you will need to charge it up again to start the car until you can replace it or fix any problem that might cause the battery to fail to charge, such as a faulty alternator or electrical connection. But how do you do this without a battery charger?

There are three ways to charge a car without a battery charger. These are to jump-start your car, to connect your car’s battery to that of another running car, or to the alternator of another working car. Also, solar power or an inverter, (for cars running on 24V), can be used in some circumstances.

You might also want to invest in an automotive-grade solar panel if you live in an area where this resource is plentiful. These are typically found at outdoor stores like Sportsman’s Warehouse

The alternator of a car accumulates electrical charge as the engine turns over and you drive your vehicle. Therefore, you could connect the alternator from a running car with a charged battery to directly charge up the dead battery. This will provide enough charge to start your car and allow you to drive it and charge up the battery completely. This is what we normally call jump-starting.

The first thing you need to do is find out if your car has a 12V or 24V battery. If it’s the latter, you’ll have to buy an inverter. Most cars, however, use 12 V batteries. In this case, there are plenty of ways to charge up the car battery without the use of a charger. Let’s take a closer look at how to charge car without battery charger.

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How You Can Charge Your Car Battery Without a Charger

There are many reasons that one’s car battery can go dead. If it does and your car won’t start, how can you charge it without a battery charger and using normal items you might have at home?

A jump start allows you to connect another car’s battery to your car’s battery. This method will get your dead battery back up and running in no time, but it can be difficult if you are unable to get jumper cables from the other person with the engine still running.

Jumper cables: When a car battery has a dead cell or is otherwise drained, jumper cables can be used to provide a current from another car’s battery.

If you don’t have a battery charger, the best way to charge a dead car battery is to use jumper cables and another running car. The jumper cables attach to the good battery and then connect the other end of the jumper cables to the dead battery. The other car needs to be running.

Turn on the good car and let it idle for about five minutes before turning it off again. Your dead battery should now have accumulated enough charge to start your car. Once your car runs it will continue to charge up the battery. Please note that you may need to replace your old battery if it doesn’t hold its charge or dies again.

Notes on Using Jumper Cables Safely

The first thing you need is to make sure there are no sparks or open flames in the area. You need to disconnect the car or truck battery by removing the negative cable first and then the positive cable.

Next, you take one set of jumper cables and connect one end to the positive terminal on your own vehicle’s battery and then connect the other end to the positive terminal on the dead vehicle’s battery. Now, attach one set of jumper cables to each side of your dead vehicle’s battery so that they are connected together in series.

Charging a car’s battery requires that you connect it to a source of power using jumper cables, which are two wires with clamps on each end that connect the battery to power. This is how jump-starting works.

For a helpful description of how to use jumper cables safely or a portable jumper, check out this video.

How to Charge Car Without Battery Charger
Source: Mechanic Base

What is the Difference between Jump Starting and Charging a Car Battery?

The difference between jump starting and charging a car battery is important. Jump starting is when you use another vehicle’s battery to power your own vehicle. It usually happens when your car dies or has a dead battery. What happens is that the running car transfers power to your dead battery and enables your car to start up. Once this happens driving the vehicle should charge the dead battery fully.

The car has a system that accumulates electricity and charges the battery as it runs. This system is self-sustaining and as long as your car is maintained and your battery is healthy, the battery should not run out of charge and is constantly recharged.

A car’s alternator provides power to the car’s electrical system when its engine is running. When the engine is off, the battery supplies power to the electrical system, charging the vehicle’s battery is essential for a running car.

The alternator is the component in your car that ensures your battery gets fully charged and never runs out of power. The biggest demand for power on your car battery occurs when the engine is starting, so this is most likely the point when you may notice the battery failing to start the car.

What are Some Other Ways to Charge a Car Battery Without A Charger?

The car may need charging but there is no charger available. First, check to see if there are any other cars available that have a charger for plugging in your vehicle’s battery, if not then you can also try some other alternatives that will help charge the car without a charger.

Apart from the techniques used above to jump-start your car by connecting it to a running car with a good battery or by plugging the battery into a power outlet, there are other ways to charge your car battery without a charger. These include:

  1. Using an inverter.
  2. Using solar energy.

One method is to use an inverter. This is not always available for everyone, but if you have access to one it can be a good option for charging your battery. This is because the power from the inverter can be used to charge your battery through cables that are usually included with the inverter itself.

Another method is using a portable power source like solar panels which you usually find in electronics shops. A solar panel, provided it is not more than 5 Watts, can be connected to a car battery and helps to charge it. The most important thing here is not to over-charge the battery by connecting it to the wrong kind of solar panel. There is some helpful real-world advice and information on how to do this here.


There you have it! How to charge your car battery without a charger. Please make sure that if you choose any of the above-described methods that you ensure your safety by following accepted advice when using electricity and especially avoiding touching jump cables together or failing to find a good earth point for the negative cable.

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