How To Charge A Car Battery Without A Charger

by Phil Borges // in Car

When your car battery dies, it can be a real pain to get it charged again. Many people think that you need to have a special car battery charger in order to do this, but that is not always the case. One of the most important things you can do to prepare for an emergency is to have a plan. In this blog post, we will discuss how to charge a car battery without a charger. This is an important skill to have in case of a power outage or other emergency. Keep reading for our tips.

How to charge a car battery without a charger?

You can charge a car battery without a charger by using a 12-volt trickle charger. Trickle chargers are available at most auto stores and can be plugged into the cigarette lighter in the car. The trickle charger will slowly charge the battery over time.

You can also charge the battery with your car’s alternator, but this method isn’t as effective and doesn’t work very well in cold weather. 

Another way to charge the battery, which is very common in the car industry, is to give your car a jump start. A car jumpstart is a procedure used to start a vehicle’s engine by using another vehicle’s battery. The batteries will create a current that will flow through the cables and charge the other battery.

How to jump start a car with jumper cables? 

-The first thing you need to do is find another car that’s running and park it close to your car. The two cars should be close enough so that the jumper cables will reach. Once you’ve parked the cars, open up the hoods and identify the batteries.

-The battery terminals in your car will usually have a red cover, while the other battery will have a black cover. If you’re not sure which is which, look for the positive and negative terminals. The positive terminal is usually bigger than the negative, and it will have a plus sign (+) next to it.

-Once you’ve identified the batteries, make sure that both cars are turned off before you start connecting the cables. Locate the black clamp on one end of the jumper cables and attach it to the negative terminal in your car. Attach the red clamp on the other end of the cable to the positive terminal in your car.

-Next, connect one end of a jumper cable to the black terminal on the other car and connect the red end to its positive terminal.

-Now you’re ready to start your engine! You might want to keep an eye on both batteries to make sure that they aren’t overheating or leaking any fluid. If everything is working properly, then after a few minutes of running, your car should be good to go.

If your car doesn’t start after a few attempts, check the jumper cables for any loose connections or breaks in the wires. These are usually caused when connecting one end of the cable to another battery’s terminal without attaching it to the car’s battery first. Make sure that all of the connections are tight and secure before trying to start your car again.

If jumpstarting the car went successful, make sure to disconnect all of the cables properly. Don’t just yank them out, or you could damage the connectors on the battery or on the jumper cables. Always be careful when working with batteries, especially when you’re trying to charge them without a charger.

Sometimes a jump start is enough to get a car running again, but other times it’s just a temporary fix. If the car remains dead after jumping it, you should have it looked at by a professional. There could be something wrong with the battery, with the wiring in the car, and even more serious problems with the vehicle, and all of those problems need to be fixed before you can safely drive your car. If this is the case, it’s best to take the car to a mechanic for further diagnosis and repair.

How do you manually charge a car battery?

There are plenty of ways to charge a car battery manually. The best way to charge your car battery is by using its recommended charger. This way, you can ensure that your battery is getting the proper voltage and amperage it needs. You just need to be careful when charging your car battery manually because there are high chances of an explosion if not done correctly. 

A car battery needs to be charged because it is a storage device for electrical energy. When the car engine is running, the alternator generates electricity that is used to power the car’s electrical systems and charge the battery. When the engine is turned off, the battery provides power to those systems.

If a car isn’t being driven regularly, the battery will eventually run down and need to be recharged. That’s why batteries in cars that are stored or not used often need to be trickle-charged – it keeps them from losing their charge completely.

How can I make a homemade car battery charger?

There are a few ways to make a homemade car battery charger. One way is to use a battery charger or AC adaptor to charge a car battery at home.

When using a battery charger that plugs into the wall, first make sure that the polarity of the plug is correct – that the positive terminal of the charger is plugged into the positive terminal of the battery, and vice versa. Second, make sure that the amperage of the charger is appropriate for your battery size. Most chargers will specify what size batteries they are compatible with.

Some would use a laptop charger, where it needs wires that will connect to the charger and to the battery, then plug the charger into a wall outlet. This procedure might take long hours to charge the battery.

Whichever method you choose, it is best to be careful when charging a car battery as it can be dangerous if done incorrectly. Always consult a professional if you are unsure about how to charge your battery.


How to charge a car battery without a charger is easy when you know what tools are required and the proper way of using them. Always be sure to have the right equipment at hand before attempting any kind of auto repair or maintenance task. Always work with caution and safety in mind.

About the author, Phil Borges

Phil Borges is a battery aficionado. He's written extensively about batteries, and he loves nothing more than discussing the latest innovations in the industry. He has a deep understanding of how batteries work, and he's always on the lookout for new ways to improve their performance.