A battery is an essential part of a car as it supplies the needed current to the vehicle and feeds the starter motor which then starts the engine. This means that the electrical system of a vehicle wouldn’t be functional if the car battery is dead.
Having a dead car battery is one of the most common problems associated with having a car and sometimes it could happen at the wrong place or time. Situations like this usually strike you when you are in a haste, and you might be far away from the charger.
However, in this article, I would be teaching you how to charge a car battery without a charger. This will help you through those embarrassing moments when your car battery dies without giving you previous notice.
How to Charge a Car Battery Without a Charger
Like earlier said, having a dead battery simply means that you would be unable to start your vehicle like you normally do, likewise, all the electrical systems connected to the car would also be dead.
So the following methods would help you awaken your car battery without a charger.
1. Jumpstart your car
This is a simple method you could use to get your battery up and working with the aid of the power from another battery through a jumper cable. This does not require many tools or professional mechanical knowledge rather all that is needed is a good set of jumper wires, which varies in lengths ranging from 10-20 feet.
However, always ensure to take precautionary measures while jump-starting your car to ensure your safety and that of the people around you.
You can check out our article > What is the Proper Battery Cable Connection When Jumping Two Automotive Batteries?
Ensure to read the user manual of your car to know if there is an additional step in jumping start your car and be careful of electric shocks while handling the jumper wires and metal clamps once they are connected to the cars. If possible wear protective glass and gloves
Note: The longer the cable the more the energy loss, so shorter cables that are equally thick are preferable.
2. The use of a Solar Panel
Though this is not the best way to charge a car battery, especially if the battery is totally dead. It requires tools like voltage and amps. The are a few different ways to achieve this but for your safety, I would recommend the use of a solar charge controller which will block reverse current and prevent the battery from overcharging. The size of the solar panel needed and how long it will take to charge the battery is dependent on the size of your car battery.
3. Charging a car battery with a home inverter wall outlet.
This method is not well known and may need you to get some more equipment. However, it is not a method you should use frequently. As we all know an inverter is an electrical device that converts alternate current to direct current. In order to achieve this goal, you have to take the following steps.
Step 1: Before setting up this connection please ensure to disconnect the inverter from the power supply, then connect the black wire of the inverter to the negative port of the battery and the red wire of the inverter to the positive port of the battery.
Step 2: Check the connection the second time to ensure that it is well connected as stated above, then plug the inverter into the power outlet.
Step 3: The battery may charge for 2 to 3 hours from the Same high power supply that comes from inverters. However, this method should only be used when you are in a haste.
4. The use of Battery Isolators
These battery isolators are well-known among RV drivers and regular campers. A battery isolator allows you to charge a car battery using the electrical power from the alternator of the vehicle when it is installed. This works by sending part of the electrical power that has been generated by the alternator to the secondary battery.
However, this method is not the best for a completely dead battery as the current produced may not be comparable to that of a car charger.
5. Leave The Battery to Charge in Another Vehicle
This method can only be possible if you have access to another vehicle that uses a battery similar to the one you want to charge.
However, before a swap between these two batteries is made, there are a few things that you need to bear in mind and ensure.
Ensure that both vehicles have similar mAh ratings, shapes, and sizes.
Also, ensure that the battery been donated doesn’t need to be registered with the ECU before it begins to charge properly.
After ensuring the above-mentioned things then go ahead to fix the battery in the car while making sure that the engine and all the auxiliary electrics are switched off. Once the battery is fixed and the engine is on and running, you can ensure that the battery gets charged slowly and fully by taking the vehicle for a long drive.
Frequently Asked Questions
How long does it take to recharge a dead car battery?
24 hours, the speed at which charging occurs depends on the result you wish to obtain. Normally, for maintenance usage for dead battery 2-4 amperes, it will take 24 hours to fully charge.
Can a completely dead battery be recharged?
Yes, a completely dead battery can be recharged using a charger or any of the methods mentioned above if the charge isn’t available.
Can a car battery be charged through the cigarette lighter?
Yes, it is possible to charge the battery through a cigarette lighter socket, but in other to do this, the car’s circuitry will require having the lighter socket live and setting the ignition switch to “accessories”.
Can you charge a car from a socket?
Yes, a car can be charged using a domestic three-pin socket. However, it is best charged using a dedicated home EV charger which delivers around 7kW of power.
Can you jump-start a car with a wall outlet?
No, you cannot jumpstart a car using a wall outlet because cars run using a 12-volt DC supply, while your house uses an AC supply. So trying to use AC current on a DC battery could result in serious damage.