How to properly connect the battery in a car

How to properly install the battery in the car and connect it

Almost every car owner at some time is faced with a situation where he has to remove a static source of electricity from the car, and then put it back or replace it with another battery. This procedure does not cause any difficulties if everything is done correctly. Just don’t forget that violating the rules can lead to damage to the vehicle’s electrical equipment and the energy source itself. So, how to properly connect the battery to the car?

Preparing to install the battery

Before connecting the battery to the car, determine how charged the battery is. It is better to use a load fork, but if you don’t have one, a regular multimeter will do. At the terminals of the charged product, U = 12.6–12.7 V. It is also recommended to measure the solution with a hydrometer (the norm is density 1.27). If the battery is inoperative, it needs to be charged. You can do it right under the hood by disconnecting the “mass” wire from the negative contact using a “10” wrench. Carry out work outdoors.

Battery replacement

In vehicles, the battery is fixed to the body with clip-plates, bolts, screws, and nuts. So look for a "12" or "13" wrench depending on the size of the locking nuts. If you are installing a new or different battery, prepare it in advance: check the degree of readiness (charge level, solution density), place it next to the machine on a flat surface.

Battery location

Before installing a new battery in your car, find out where the battery is: in the engine compartment or luggage compartment. Sometimes the battery is located under the seat in the cabin. It all depends on the brand of car, but most often the battery is located next to the power unit, closer to the radiator trim, on the right or left.

Compliance with safety precautions and battery removal

Before installing the battery, place wrenches nearby and put on rubber or cotton gloves. Please note: the product weighs more than 10 kg, so be careful. Just in case the acid spills, prepare a soda solution to neutralize it. Now it’s worth mentioning advanced electronic equipment, which equipment (especially imported ones) is often crammed to the very roof. If you have a car with airbags, check the instructions. After removing the ignition key, the ignition cartridge remains ready for another 5–8 minutes (check the time in the manual). Therefore, you need to wait for the specified period.

The second nuance lies in the on-board computer. A serious failure is possible if you deprive it of electricity. To prevent such troubles, use a portable charger in advance, which will power the electrical equipment of the equipment while you remove the old battery and attach the new one. Mobile chargers come with alligator clips or operate through a cigarette lighter. In the latter case, everything is much simpler: insert the plug into the socket and calmly disconnect the battery. Further actions:

Unscrew, but not completely, the fastening of the negative wire.
Carry out a similar operation with the “positive” wire from the starter.
Unscrew or loosen, depending on the design, the nut (or bolts) securing the battery to the car body.

Why is the ground terminal removed initially? It’s simple: if you start unscrewing the nut of the “plus” wire, there is a risk of the key touching the metal parts of the car, which will eventually cause a short circuit. When removing the battery, immediately place it on the floor or other flat place (table); do not use the car fender as a “transit”: the paintwork will be scratched.

External inspection of the battery

Inspect the product from all sides. There should be no liquid leaks on the body, indicating cracks. If they are very small, seal them with acid-resistant plastic. But if there is serious damage, the battery will have to be disposed of. If the removed battery is to be used in the future, wipe it with a dry cloth. The same must be done with the niche for the battery. Now all that remains is to figure out how to properly install the battery in the car.

Battery installation

How to put a battery in a car? When the battery is ready for service, clean it from dirt. It is advisable to treat it with a soda solution (a teaspoon per 200 g of water) to neutralize the electrolyte. The latter can remain on the surface of the battery cover and create a current “path”, which leads to self-discharge. Now inspect the terminals: they often oxidize, which prevents good contact with the car’s electrical wires. Therefore, sand both the terminals and wire leads. It makes sense to treat the latter with a water-repellent compound.

The next step in installing a new battery on a car is attaching the battery to the body. There is a difference in the methods (there are only 2). How to secure the battery in a car from Europe? This is done by means of a plate placed at the bottom of the case and hooked onto the lower protrusion on the battery. How to install a battery in a car from Asia? These products are secured using a plate that fits onto the top of the battery.

Connection

How to properly connect the battery in a car? Connection to the vehicle's on-board network must be done in the reverse order. First screw the plus wire, then the minus wire. Most car manufacturers make wire ends of different diameters: “+” is always larger - the corresponding battery contact is also larger. Next, use a “10” wrench to tighten the nuts. Strongly, but without fanaticism! And only after that, if you had a power supply connected, disconnect it.

What not to do?

If you know how to connect the battery correctly, it is highly recommended that you do not ignore the safety requirements. When disconnecting or connecting the battery, use rubber gloves and goggles. When dismantling, hold the battery firmly - if necessary, invite an assistant: it is extremely undesirable to turn the battery, even a gel battery, where there is no liquid, or place it on its side. Before connecting the battery in the car, pay attention to the ventilation holes of the maintenance-free battery: they must be cleaned and not clogged with dirt. If you need to increase the density of the solution, do not pour acid at negative temperatures: it is advisable to perform all operations with the battery at +20°C.

Rechargeable batteries

Information site about energy storage devices

How to connect the battery to the car

In modern cars, batteries can be located under the hood, in the trunk, or placed in the cabin. A car battery is called a starter battery because its main function is to start the engine. Energy is also consumed to maintain on-board consumers and communication tools such as the winch. An important condition for maintaining the on-board system and the battery itself in good condition is the order in which to connect the battery to the car.

How to connect the battery in a car: plus or minus

Before connecting the battery to the car, you must first make sure that it is fully charged. It is necessary to make sure that the battery case is intact, without cracks or swelling. Before installation, the battery must be wiped with a solution of baking soda, neutralizing microdoses of acid and creating an insulating layer. If the battery terminals are coated with plaque, they need to be cleaned with a toothbrush and baking soda solution. Conductive lubricant is applied to the contact points of the leads.

The socket in which the battery is installed must match the form factor of the battery. It is necessary to use additional latches and brackets so that the case sits on the base like a glove. This will prevent the battery from overturning when driving over bumps, and the electrolyte will not spill.

The battery has 2 terminals, positive and negative. You should connect the battery in the car carefully. How to assemble the circuit correctly, in what sequence? It is safe to connect the positive contacts first, the red wire is used as standard. But each time you need to check the contacts additionally, according to the terminal markings. True, the manufacturers are on the safe side; they make the contacts with different cross-sections so that the wrong terminal is not put on.

The negative contact is always connected last and removed first, so as not to create a short circuit to ground. It is important to tighten the fasteners until they lock into place. Any loosening of the contacts will lead to heating of the area due to resistance. During the period of starting the motor, a starting current passes through the line, many times greater than the numerical value of the capacitance. When connecting the battery, all on-board consumers must be turned off and the ignition key must be removed from the socket.

Will the car start if the battery is connected incorrectly?

Let's ask ourselves the question, what will happen if the battery is connected to the car the other way around? The consequences will be different if the connection is mixed up with the engine running and with the ignition off. If the engine is running, the diode bridge and other electronics will burn out. Modern cars have foolproof protection.

It happened, we performed a polarity reversal with the engine turned off, and the radio, amplifier and other secondary consumers burned out. Sometimes blown fuses help out. If you connect the battery incorrectly, the less trouble there will be, the sooner you disconnect the machine from the power source.

Now many people use portable storage. In this case, the battery is recharged without removing it from the car. It is important to connect the charger to the battery correctly, avoiding polarity reversal. It is much easier to make a mistake in the connection here. Quick-release contacts in the form of “crocodiles” will fit any output. How will the devices react?

The factory-made memory is equipped with fuses that will not allow you to make a mistake. When connected, unprotected chargers form a transformer pair with the battery; incorrect connection will be accompanied by a hum. If you do not stop charging, the battery will reverse polarity. To correct the situation, you need to discharge the battery to zero as quickly as possible and charge it correctly. In order not to solve man-made problems, you need to know how to properly connect the charger to the car’s battery.

If the charger is powered from the mains, the battery must be removed from the car. Charging lasts 8-12 hours in a cool, ventilated area. Before connecting the charger, you need to make sure that the electrolyte level and its density are normal. Remove the plugs on the battery being serviced. Set the charging current.

How to connect an amplifier in a car to a battery

For some time now, car radios have become an indispensable component. For optimal power supply, the device is connected directly to the battery. This allows you to listen to music while the engine is off. But you need to understand that if a leak occurs, the radio can discharge the battery to zero.

For a powerful and clear sound of music, an amplifier is used that uses the energy of the battery, increasing it to the required parameters. The amplifier's power is connected to the battery through a copper cable with a fuse designed for the current strength.

The wires to the location (usually in the trunk) are laid in a corrugated tube. A fuse is mounted to the positive wire, and the negative contact is shorted to ground. The radio and amplifier are connected by an interconnect cable.

How to connect a voltmeter to a car battery

Not all cars are equipped with voltmeters. For an experienced car enthusiast, this device will tell you about the condition of the battery and on-board system.

Having chosen the instrument, you should place it on the dashboard. A voltmeter is connected to the positive output of the battery. A conventional electromechanical relay will allow you to create a circuit where the readings of the measuring instrument are read only when the ignition is on.

We offer a visual video lesson on installing and connecting the battery when replacing it with a new one.

How to connect a battery to a car

07/30/2019 admin Comments No comments

Almost every car owner has encountered a situation where they need to remove and then connect the battery. To perform this simple action, there is no need to seek help from a specialist. Even a girl will quickly understand how to connect a battery to a car. Having certain knowledge, you can easily do this yourself.

What to do if the battery stops working

The main source of electrical power for a vehicle when the engine is not running is the battery. With its help, you can not only use lighting and multimedia equipment, but also perform the most important action - start the car engine starter.

If you are faced with a battery failure problem, do not rush to replace it immediately. First you need to check the charge level. This is easy to do with two stranded wires and a 12 W light bulb. If when connected it glows dimly or does not light up at all, then the battery just needs to be charged. Otherwise, it will need to be removed and replaced.

A decrease in battery voltage may be due to prolonged vehicle inactivity, low temperature conditions, battery age, grounding of the vehicle's electrical circuit, lack of electrolyte, and other reasons.

Why do you need to remove the battery from the car?

There are several reasons why you may need to remove the battery. These include:

the battery is completely worn out and replaced with a new one;
the need to charge from the network;
de-energizing the on-board network for repair work;
lack of access to other components of the car;
installation of additional electrical equipment and lighting devices on the vehicle;
long break in vehicle operation.

If it is necessary to remove the battery due to replacement with a new unit, before purchasing, be sure to familiarize yourself with the external data of the unit, namely, evaluate the location of the terminals on the cover. In different models they may be located oppositely. When purchasing a battery with incorrect terminal locations, it may happen that the connected wires simply do not reach.

Helpful advice! Sometimes the battery polarity symbols may be erased or dirty, but it is important to remember that the positive electrode is always 2 mm larger in diameter than the negative electrode. For preventive purposes, you can periodically recharge the battery approximately once a year at the beginning of winter at a low current of 0.025-0.05 of the battery capacity.

If the battery is too high, it may not fit into the standard seat, which may cause the terminals to touch the inside surface of the hood, which will cause a short circuit and failure of the wiring.

If you start charging the battery while it is connected to the car, this may adversely affect the condition of the on-board equipment.

Attention! The battery in a car contains enough energy to cause a fatal blow to a person. In addition, there are corrosive substances inside it, which lead to the formation of highly flammable gas. The electrolyte present in the battery is a very aggressive solution that contains sulfuric acid.

Safety measures include the use of cotton and rubber gloves and safety glasses for working with electric drives. To neutralize the acid, you should keep baking soda with you just in case.

Removing and connecting the battery requires the use of a certain set of tools:

open-end wrench 10 for unscrewing the terminals;
key 13 with a wrench for removing the battery mount.

Depending on the car model, the battery may be secured either from the bottom or the top or not be secured at all. After determining the type of fastening, you can begin to disconnect the battery.

How to connect a battery to a car: sequence of actions

What is the sequence of actions in order to restore the functionality of the battery and put it back under the hood:

Remove the key from the ignition switch.
If there are airbags, wait 10-15 minutes so that they do not operate as a result of a short circuit of residual currents.
Loosen the nuts on the terminals using a 10 key, rotating them counterclockwise 2-3 turns.
Remove the wire with the negative terminal, loosening it around the battery terminal. As a rule, this wire is black.
Remove the wire with the positive terminal in the same way. It differs from the first one only in red. It is important to ensure that it does not touch the metal elements of the car, as it is possible to accidentally damage the on-board wiring due to a short circuit of residual currents.
Remove the 2 nuts on the rods that hold the pressure plate in place. To do this, you need to use a 12 or 13 socket head.
Remove the pressure plate and remove the retaining rods from their seats.
Remove the battery from the landing platform, while calculating your strength, since its weight can reach 20 kg.
Clean the platform from contamination. If oxidation has already begun, the surface of the platform and terminals must be treated with fine-grained sandpaper, then wiped with a solution of baking soda.
On the wire terminals, you also need to stop the oxidation process, if any, using a round metal file. After this, the clamps must be treated with a special antioxidant.
Install the new battery on the landing platform without changing the location of the terminals.
Insert and secure the holding rods into the seats by placing a pressure plate on them.
Screw the nuts onto the rods and tighten them with a wrench.
Connect the red wire to the “+” terminal.
Secure the clamp with the black wire to the “-” terminal.
Tighten the nuts on the clamps using a wrench.

Consequences of incorrect battery connection

Incorrect connection of terminals has a variety of consequences. Sometimes, irreversible.

If the terminals are mixed up while the engine is running, it may be a failed electronics, generator or diode bridge, burnt-out radio, etc., at best, the fuses will blow.

Attention! The amount of loss depends on the speed of the owner’s reaction. It is necessary to disconnect the wires from the terminals as quickly as possible!

If there is a long-term short circuit, which occurs when the poles are reversed, the wires begin to melt and a fire is possible. If the ignition was turned off during installation, the fuse most often blows. Or the on-board computer breaks down. The battery also fails.

What happens if you reverse the polarity when installing the battery, or when recharging it using another car, you will learn from this video:

How to choose a battery

You know how to connect the battery to the car plus minus, but first you will need to purchase one. Please note that recommendations from store consultants are not always appropriate, so pay attention to the following characteristics:

Battery capacity – its unit of measurement is ampere/hour. The larger the car engine capacity, the larger the battery capacity should be;
A high price does not always indicate quality. It is not uncommon to purchase a good battery at a reasonable price;
if you pay attention to the brand, it is better if it is a product from a European manufacturer;
Even for new batteries, storage conditions must be observed - if charging and storage temperature are incorrect, the performance will deteriorate even before installation under the hood. You should definitely check it before purchasing;
The starting current of the battery should be the same as on your old equipment or more. Under the influence of high temperatures, the battery can lose up to 35-40% of its capacity;
the polarity of the battery can be either direct or reverse, that is, the terminals on it will be located differently, so you should pay attention to where they were on your old battery;
Before purchasing a device, a store employee must check the voltage with a load plug. 10 seconds will be enough. It must be at least 9 V;
The warranty from a reliable manufacturer is 4-5 years, which is a good indicator of quality.

This video explains how and which battery to choose for your car:

Tips from the professionals

Work on replacing batteries must be carried out in an open space where the accumulation of harmful gases is impossible.
Before removing the battery, the ignition key must be turned to the zero position or removed from the lock.
An old battery may be damaged, and inside it there is nothing more than diluted sulfuric acid, so special dielectric gloves and safety glasses must be used.
It is advisable to remove rings and bracelets from your hands.
The wires should be located as far as possible from the battery.
Do not tilt or turn the battery over.
Do not damage the filler plugs or neck.
Do not add acid and store a discharged battery, as this can cause complete failure of the equipment, especially at low temperatures.

Advice! After the battery is connected, you will need to check the operation of the lights. To do this, without starting the engine, you will need to alternately turn on the low and high beam headlights, and also check the alarm system and the operation of the windshield wipers. All these devices must work properly.

Battery care to increase service life

For long-term and uninterrupted operation of the battery, proper care is required. It consists of cleaning the battery and terminals from dust and moisture, and removing dirt from the ventilation holes. Treatment of fasteners with anti-corrosion agents.

With proper care and proper use, the battery will last a long time and will not require replacement. The main thing is to monitor the condition of the equipment and be especially careful when replacing and installing it.

Learn how to double your battery life in this video:

After you adhere to all these rules and recommendations, choosing and replacing a battery will not be difficult for you. You should not try to avoid this procedure, as it may make further operation of the vehicle easier. After all, failure to comply with the requirements can lead to incorrect operation of your car, and any malfunction during its operation can cause an emergency situation.

Useful video

In this video you will learn how to install the battery on a car:

Correct and reliable connection of the battery to the car

A car battery is a power source for the electrical circuits of a car. The main purpose is to supply current to the starter, which starts the engine. After starting the latter, the electrical circuits are powered by a generator. For that. To figure out how to properly connect a battery to a car, you need to familiarize yourself with its structure and consider what types of batteries there are.

Types and design of power supplies

Lead-acid battery. This power supply consists of a plastic housing with six cells. The body contains lead plates, and each cell is filled with electrolyte in the form of liquid acid.
Under conditions of proper maintenance and operation, the service life reaches 5 years from the date of purchase.
Lead non-woven AGM battery. The AGM power source is an advanced lead-acid battery. Thanks to improved characteristics and power, the starting current has increased. The AGM battery has a one-piece closed housing and does not require maintenance. Most often used on electric vehicles.
Lead-helium battery. In an ordinary lead-acid battery, the acid is in liquid form in the housing. In a lead-helium battery, sulfuric acid and silica change from a liquid to a gel. This invention is suitable for those who need to use the battery in a lying or inclined position due to conditions associated with the design. The power supply is housed in a closed housing and does not require maintenance.
Traction batteries. The most powerful power source, one of the best as of 2019. Used on electric vehicles. Can continuously supply electrical energy to the electric vehicle and withstand multiple charge and discharge cycles. The traction battery provides voltage from 24 V to 96 V and an electrical charging capacity of up to 1000 Ah. The service life is more than 10 years.

How to properly install a battery in a car

In order to install and connect a power source to a car, it is not necessary to go to a service station - this can be done at home or in the garage.

You must adhere to the following rules:

When installing a battery, eye protection is a very important factor. If you accidentally mix up the positive and negative cables, the battery may burst when heated, spraying the acid in the case. Latex gloves will protect your hands in case of a leak.
Make sure the ignition is turned off and all electronic devices are turned off. A voltage surge will cause electrical equipment failure.
Before installing the battery on the car, you need to clean the terminals with baking soda diluted with water. To do this, use a wire brush to remove any corrosion or buildup of dirt and oxide on the terminals. To prepare the solution, add one tablespoon of baking soda (15 ml) to two cups (470 ml) of water. Once cleaning is complete, wipe the terminals and areas of possible contamination with a clean rag.
Using the same mixture and a wire brush, clean the terminals that are on the car. Once cleaning is complete, wipe away any remaining residue from the brush and soda, as well as any areas of possible contamination, with a clean rag.
Good contact is required between the terminals on the car and the plus and minus on the battery.
The positive and negative terminals of the battery, as well as the terminals located on the vehicle, must be lubricated with a special lubricant to prevent corrosion.
It is necessary to check and repair any damage or cracks on the wires connecting to the power source. If necessary, replace the wires using a socket wrench of the correct size. You need to distribute the wires so that the negative terminal is next to the minus, and the positive terminal is next to the plus.
After all the work has been done, you need to lift the battery and carefully place it in the battery compartment. You need to be extremely careful not to crush your fingers, as the battery is heavy.

How to properly connect a car battery

To turn off the battery, follow these guidelines:

To connect the power source, you first need to take the terminal of the positive wire, which comes from the electrical circuits of the car, and put it on the plus of the battery. You need to loosen the nut on the terminal and make sure that the terminal goes all the way down.
After this, using a wrench, you need to tighten the terminal with a nut until the terminal becomes motionless. To check, you need to shake the terminal by hand and tighten it again.
The negative wire must be installed the same as the positive wire. Place the negative wire with a terminal that fits from the car body and tighten it with a wrench.
If any terminal does not reach the battery, this means that the power source is not in the right place. It is necessary to place the battery in its seat.
After connecting the two terminals, you need to turn off the alarm and try to start the car. If the car does not start, you need to check the connection on the battery, on the generator, as well as the negative wire to ensure that it is securely attached to the body.

How to properly connect the battery to the car after charging

There are several reasons why a battery discharges. For example, the car was parked with the headlights or other electrical appliances on, or the power source was not used for a long time or was stored at sub-zero temperatures.

There are two ways to charge the battery:

The first method is if you don’t have a charger with you, but there is another car nearby that will help you light a cigarette from the battery and start the car. By connecting a cigarette from a working battery with wires plus to plus, minus to minus, the dead power source is connected. After this, you need to start the engine with a full battery, and then try to start the engine of another car. As soon as the second car starts, you need to remove the wires. With the help of a generator, after 30 minutes of driving, the battery will be fully charged.
The second way is using a car charger. You need to disconnect the terminals from the power source. First loosen them, then first disconnect the plus, then the minus and connect the charger wires. On the charger, the plus is indicated in red, the minus in black. Connect to the network and wait until the battery is fully charged. The battery charge level is shown by a device located on the charger. The charger is used according to the instructions.

When the power source is fully charged, you need to disconnect the wires from the charger and connect the car terminals to the battery. First connect the positive terminal, and then the negative one.

This video shows how to properly install and connect the battery with your own hands. Every car enthusiast can cope with this problem without the help of car service workers.

Proper connection of the power source to the car is very important in car maintenance. Because if the connection is incorrect, the wiring may catch fire or electrical appliances may fail. To avoid this, you must follow the rules for connecting the battery to the car, and also be sure to follow safety precautions when working with the battery.

How to properly remove and connect the battery in a car?

The interaction of components in a car provides the driver and his passengers with comfort and safety. But if something goes wrong, the car needs professional help.

The battery in a car is of great importance, allowing the car to drive on the road at night, illuminating the road ahead. In addition to lighting and signaling to other road users, the battery performs other functions - for example, starting the engine. Of course, such a demand for the electrical element in question leads to the need to replace the battery. And although it is not necessary to go to a service station to replace it, it is worth following a clear sequence of steps.

How to properly remove the battery?

Before disconnecting the battery, you will need to take precautions. It is worth knowing that the battery in a car contains an amount of energy that can cause fatal injury to a person! Moreover, the battery contains corrosive substances that can produce flammable gas.

If you want to understand the question of how to properly remove the battery from a car, prepare the necessary tools and materials. For work you will need: a wrench extension, a set of attachments, safety glasses and gloves, an old toothbrush, a tray, clamps, water and baking soda. Before starting work, turn off the ignition and wear safety glasses and gloves to protect your eyes and hands.

Next, follow the established sequence:

First you will need to find the negative terminal on the battery, which often stands out due to its black coating. Often the negative terminal is indicated by a “-” sign. Accordingly, the positive terminal is indicated by the symbol “+”
Determine which attachment you will need. Size matters if you need to unscrew the nut from the negative terminal. First the negative terminal is disconnected
Take the nozzle and place it on the nut located next to the negative terminal. Estimate the size of the socket for loosening the nut. The attachment fits onto the wrench, which may require a wrench extension.
Turn the key counterclockwise. Disconnect the negative wire so that it does not touch the terminal
Similar actions are performed with the nut on the positive terminal. After disconnecting the positive wire from the terminal, do not allow its bare end to come into contact with the metal surfaces of the car.
After turning off the power to the battery, disconnect the fastener, and then lift the battery from the compartment. Make sure you get outside help first, as the battery weighs up to 20 kilograms
Clean the compartment with a toothbrush and baking soda, then let the area dry

After completing the above steps, you can begin installing a new unit and then connecting the battery.

How to connect a new battery?

Now let's look at how to properly connect the battery in a car. Make proper preparations before starting installation. Remove dirt, dust and other debris from the corresponding connector, and then clean the internal surfaces of the wire tips using fine-grained sandpaper.

Before installing a new battery pack, you need to clean the terminals. The installation sequence for a new battery is no different from installing the old unit. Place the pressure plate on and then tighten the clamp bolts. Perform the work carefully so as not to damage the integrity of the product. To connect the battery, use the following algorithm:

Follow the reverse sequence of steps when installing the battery. Connect the "+" wire to the corresponding terminal first, and then connect the "-" wire to the negative terminal.
Some manufacturers, for safety reasons, make terminals of different diameters, thereby preventing accidental confusion when connecting wires to terminals.
Tighten the mounting nuts firmly using a wrench.

It is most often necessary to install a new battery pack due to the exhausted resource of the old one. If you are not confident in your own abilities and skills in working with the tool, use the support of the technical center staff.

Recommendations from professionals

Carry out work in an open space, since gases do not accumulate outside. It is advisable to remove jewelry, including rings and bracelets. Use personal protective equipment - dielectric gloves and safety glasses. The wires should be placed as far as possible from the battery. This is necessary in order to prevent wires from getting into terminals and metal parts of the car.

Note that after disconnecting the wire from the positive terminal, the residual current can harm the operation of the car's electrics if the wire touches the metal surface of the body. This may also cause a short circuit.

Remember that standard car batteries can generate current up to hundreds of amperes, which is equivalent to charging a welding machine.

The batteries in hybrid cars can produce 300 volts of energy, which means the current is dangerous to human life and health. Wiring is often differentiated by color. You can reduce the risk of electric shock if you wear gloves and insulated tools.

What is extremely undesirable to do?

Adhere to certain security measures to protect yourself from possible troubles and financial waste. Do not perform actions that could damage the battery housing. Do not tilt or overturn the battery. Also, do not damage the filler plugs or necks.

Do not add acid or store a discharged battery, especially at sub-zero temperatures. By damaging the contacts, you risk incurring additional costs by damaging the equipment. Be careful when working to remove and connect the battery in your vehicle.