Which battery is better for VAZ 2107 injector

A battery is a kind of “consumable” for a car, but a number of requirements and criteria are put forward for it. In order for the choice of battery to be successful, it is necessary to correctly determine the size, capacity, and design features. And if answers to technical questions are easy to find, then the real capabilities of the model can only be learned through experience, after purchase. When compiling a rating of the best batteries for VAZ, our editors conducted their own research and selected the ten most successful batteries. Participants in the review are suitable for both domestic and foreign cars. For example, batteries for the VAZ 2110 will fit perfectly on the Ukrainian analogue of the 10th Bogdan family and will last for a long time.

Pay attention to the capacitance and starter current

One of the main selection criteria is the capacity of the device (measured in Ampere-hours). This indicator tells us about the current strength during a uniform discharge to a minimum voltage of 10.8 volts. The discharge duration is set to 20 hours.

To put it more simply, we mean the battery's energy reserve.

Thus, according to GOST, a battery for a VAZ 2107 is required with a capacity of 55 Ah. At the same time, it should be taken into account that this option is applicable for a standard network with a minimum set of on-board electronics. If additional electrical appliances are used, a 60 Ah battery is quite acceptable.

In addition, do not forget about the starter (starting) current. This is a power indicator that affects engine starting in cold weather. The optimal solution for the brand in question is 420 – 530 A.

what is the polarity of the battery?

One of the most optimal batteries for the VAZ 2107 car, with a capacity of 60 Ah.

The higher the battery capacity, the greater its power. In addition, in modern models a lot of additional equipment is installed as options, which immediately increases the load on the battery, which also must be taken into account when purchasing it.

In general, capacity is characterized by the amount of electricity that the battery is capable of delivering in long-term discharge mode. Typically, the capacity is determined at a 20-hour discharge. When determining the nominal capacity, the battery is discharged continuously (at +25°C) for 20 hours with a current equal to 0.05% of the total battery capacity. Let's say, for a 60Ah battery the discharge current will be 3A, and for a 90Ah battery – 4.5A.

There is also such a thing as reserve capacity, which is measured in minutes and should approximately correspond to the driving time of the car in the event of a generator failure. For example, for a 55Ah battery, the reserve capacity will be approximately 85-90 minutes. What does it mean that the car moves thanks to the energy of the battery (fully charged at the time of generator failure) for 1.5 hours.

Other important selection parameters

Having understood these criteria, go to the device type. The most common maintenance-free models today are:

Low antimony (Sb);
Calcium (Ca/Ca);
Hybrid (Ca/Sb).

Old-style antimony ones are rarely used and are gradually becoming a thing of the past. Here we are talking about the addition of calcium or antimony to lead plates, which increases the performance characteristics of devices.

Make sure that the device has straight polarity.

In terms of dimensions, the option with a length of 241 mm, a width of 175 mm, and a height of 190 mm will come in handy.

When caring about quality, it is not at all necessary to choose an imported product; Russian developments are in no way inferior to foreign ones. batteries “Tyumen Premium”, “Zver”, “AkTech” have proven themselves well

Be careful when connecting the device; if you are doing this for the first time, consult a specialist.

Problems under the hood

Before buying a battery, we advise you to make sure there are no other reasons for its poor performance under the hood.

To ensure that the driver is always aware of the condition of his battery, there is a charging sensor (voltmeter) and a warning lamp on the dashboard of the VAZ 2107. According to the rules, when igniting, the lamp always lights up, and the sensor raises the arrow to the white indicator. When the engine starts running, the light should go out and the sensor should move the arrow to the green indicator.

Dashboard diagram showing the location of the voltmeter:

voltmeter;
speedometer;
odometer;
tachometer;
coolant temperature gauge;
econometrician;
control lamp block.

If the car does not start and the red light is on, this indicates that there is simply no battery charge to start the engine.

The scheme of action is such that the first step is to check the state of the relay regulator built into the VAZ 2107 generator. This sensor should monitor the battery voltage, that is, lower or increase it if necessary. Usually the malfunction of this part is the main cause of such problems. In addition, check the wear of the brushes connected to the relay. Remove them from the generator and check their mobility with a simple hand pressure.

Now, using a voltmeter, you need to find out if there are voltage failures on the battery. If it approaches the number 14, then the relay, without a doubt, needs to be replaced, and this is what the lamp was telling you.

Find a round part with a yellow wire on the back cover of the generator (this is the relay) and you can begin dismantling.

The sensor is attached to the generator using two bolts. We unscrew them and disconnect the negative terminal from the battery. Thus, you can freely remove the relay and install a new one in the reverse order.

The new relay can also be tested (diagram below). We connect a multimeter to its brushes, and to its terminals, for example, a car battery. If the relay is operating correctly, you will see numbers on the multimeter display - voltage indicators.

multimeter;
control lamp;
"ground" of the voltage regulator;
voltage regulator output;
brushes.

If after these steps the engine was able to start and the lamp no longer lights up, this means that the cause of the malfunction has been successfully eliminated.

Basic aspects of choosing a car battery for the VAZ 2107: what do you need to know?

The battery determines how quickly the car will start and how electrical appliances will operate when the engine is not running. Therefore, it is important to choose the right device. The article discusses the battery for the VAZ 2107 car: what parameters should be taken into account when choosing, what are the main faults.

Options

In order to choose the right battery for a VAZ car, including UAZ, you need to know what functions it performs. The main purpose of this device is to start the engine. The second function is to provide power to consumers of the vehicle's electrical network in the event of a generator malfunction or when the engine is not running.

The device must be selected in accordance with the needs of the machine's electrical network. The main parameter you need to focus on is capacity. It must correspond to the number of electrical appliances and the engine size of the VAZ 2107.

The second important point to pay attention to is the location of the output terminals. Polarity can be direct or reverse. For batteries with reverse polarity, the plus is on the right, and with direct polarity, it is on the left.

Forward and reverse polarity

The next important parameter is the starting current. The value of this current determines how long the battery can turn the starter, which is especially important when starting the engine at low temperatures in winter.

In addition to the listed parameters, the dimensions of the device are important. In order for the new battery to fit into its regular place without any problems, you need to measure the height, width and length of the old one.

Criterias of choice

There are two types of devices on the automotive market: serviced and unattended. Serviced models require regular addition of distilled water or electrolyte. Professionals recommend using serviceable devices on VAZ 2107 cars, since they are more suitable for use on older car models with an unstable electrical system (the author of the video is the Electromotor Company).

When choosing a battery for a VAZ 2107, you should consider the following factors:

The capacity can vary from 45 A/h to 65 A/h. For winter, when a large starting current is needed, products with a capacity of 55-65 A/h are purchased.
The battery for VAZ 21074 has a positive terminal on the left, so the polarity must be straight.
Dimensions of the VAZ 21074 injector battery: 242x175x190.
When choosing a battery, you should take into account the engine model. For the VAZ 2107 injector and carburetor it has some differences.

When purchasing a new product, you must check its functionality and inspect it for mechanical damage.

Common faults

Battery life is 5-7 years. During operation, malfunctions are possible; they are detected by the sensor. If problems arise with the battery, then thanks to the sensor this situation is reflected on the dashboard: the battery charge arrow begins to twitch, and a light may come on.

Charging arrow on the seven

During operation, the following device malfunctions are possible:

There may be a faulty starter or alternator. If the starter malfunctions, an additional load is placed on the battery, since more electricity is required when starting the engine, so the VAZ 2107 may not be charged enough. If the generator does not work, the battery does not receive recharging, but only consumes electricity.

It is better to purchase a new product in a specialized store of trusted manufacturers. During operation, you should monitor the charging, which is reflected using the appropriate sensor. If the charging light on the dashboard lights up, the arrow twitches, the battery needs to be recharged.

If you charge your VAZ 2107 battery on time, then it will last longer. It is also necessary to perform maintenance at least once a year.

Video “How to choose a battery”

This video explains when and how to choose a battery (the author of the video is NarodTV).

Rating of the best batteries for VAZ cars for 2021

Despite the expanding presence of foreign cars on Russian roads, a significant number of cars are still domestic Zhiguli cars, which were produced by the Volzhsky Automobile Plant in Tolyatti. Over almost half a century of history, the company has produced millions of cars, which were known abroad under the LADA brand.

In connection with the release of many models, car owners have reasonable questions - what parameters and what brands of batteries are suitable for a particular car. When choosing a device, you need to know the functionality and dimensions that will allow you to easily install it inside the machine. The review provides information about the types and design of batteries suitable for VAZ, the best manufacturers of these products, as well as their descriptions and characteristics in order to select the best products.

Battery recommendations for VAZ 2107

VAZ 21074 - carburetor CAR - 2004 release. The nature of the trips is 85% city (from 3 to 8 km) and 15% intercity (up to 50 km one way). I bought an Akom-polyus battery in October 2007. The battery was released in August 2007. I don’t remember the exact price - it wasn’t the most expensive. I went with her until March-April 2016 and even a little longer. It’s just that somewhere from that time on I became the owner of a Bosch battery - my son threw it in: he kept this Bosch after selling the car, which had a new battery installed before the sale (the buyer’s condition). After which I alternated them until December 2016 (a month or two on one, then the same amount on the other). And in the winter of 2022 I only drove a Bosch, although the Akom-Polyus battery is the most alive in its venerable 10 years, and in the summer of 2022 I will alternate between them again. By the way, Bosh is no longer young either: 8 years old (I deciphered the code on the battery, produced in 2009)! Before I forget - the Akom-pole was completely discharged 2 times: once it was discharged to 6 volts by the alarm installed on the car (the snake burned out!), and the second time I left both interior lights on for two days (I didn’t think that two access lights were on capable of this). I don’t know how many volts were left in the battery, but the alarm refused to work and not a single light bulb in the car showed any signs of life. This happened five years ago. But nothing. I tried it with a charger and it still works. I think that the reason for the long life of the batteries is the more frequent connection of the battery to the charger than is customary for many users. I was forced to do this because... With the naked eye, the battery was undercharged by the standard AvtoVAZ charger - during long night trips, by the end of the trips the headlights were barely visible in the dark, and when everyone was forced to drive “during the day with fire”, there was nowhere to go - I had to charge it once a month in the summer , at least, and in winter once a week and very rarely once every 2 weeks (this is if you haven’t traveled and the temperature is not lower than minus 20 - purely for the operation of the signaling). And if the temperature approached minus 30 and there were trips ahead, I could “drive” the battery once every 2.3 days (freezing your ears and not only them at minus thirty somewhere 25.35 km from settlements in the Urals is not the best way suicide). I also inform you that I don’t understand a damn thing about the theory of charging batteries. I bought a hydrometer (I think that’s what it’s called), I didn’t understand a damn thing about what I needed to see there, I realized that this device was not for me: in my life there was no treasured 1.28 - even when viewed through a magnifying glass (I can’t see very well at close range). I spat. Although the toad is choking him, it is overgrown with dust and cobwebs behind the toilet in the toilet. Three times during the entire period, I wisely added distilled water to the jars, when the plates there were clearly exposed (the roof of the battery, even if it is removed from the car, is constantly snotty, which means there is evaporation. So I have to top it up. By the way, nothing snotty at Bosch. I want I don’t dare drill holes in the lid to check the level, because I haven’t figured out how to cover them later). For charging I use an automatic charger (I went and looked up the name of the PW700 starting-charging ORION, it seems that it is no longer available). All you need to know is to first connect the terminals to the batteries and only then plug the charger plug into the socket. And when disconnecting, it’s the other way around: the main thing is to first disconnect the 220-volt charger and only then remove the terminals from the battery. That's all science is. And now, after reading the reviews, I’m sitting and thinking about what to buy. By winter, I'll probably have to take another one. . In general, I noticed that there are mostly positive reviews about AKOM batteries produced before 2008. By the way, in the 2007 tests, AKOM batteries were in the top three! But reviews about current batteries bring up bad thoughts about AKOM-e0 batteries, billionaires are saving, oh, saving. MONSTERS! I recommend AKOM-Polyus, but only if it is recharged frequently.

Service lifeMore than 5 years

Nature of travel I don’t know

Video “How to choose a battery”

This video explains when and how to choose a battery (the author of the video is NarodTV).

Quite often, owners of “classic” cars are interested in which battery is better for the VAZ-2107 car - an injector or a carburetor. After all, you want to get the maximum effect from a new battery, and the new element should cover all needs without exception.

After the car battery has worked for 2-3 winters, experts recommend replacing it. We will consider further what criteria should be taken into account when choosing, taking into account the advice of professionals in their field.

Options

Engine compartment of the seven

Forward and reverse polarity

Carburetor or injector

In addition, the type of engine is also taken into account. So, for carburetor and injection engines or diesel engines, certain batteries are selected, the characteristics of which have some differences from each other. This must be taken into account when deciding which battery to buy for a VAZ 2107.

So the larger the engine displacement, the more powerful the battery should be selected. Also, when purchasing a battery, you need to take into account that for a carburetor engine the battery must have a larger capacity, about 5-10 Ah, than the battery for a VAZ 2107 injector.

Examples of choosing batteries for the VAZ 2107

Starting capacity The starter at the braking torque during startup consumes a current of about 350-400 A, then a normal engine start when the starter is running for 10 seconds takes about 400A*10s = 1.1Ah, which is equal to 2% of the capacity of a standard 60Ah battery.
Starting current (starting current) The second important parameter of the battery is the starting or starting current, the value of which determines how long the battery can “crank” the engine when starting, which is especially important at low temperatures in winter. When purchasing, you should always give preference to the battery model where the starting current value is higher. However, it is worth taking into account the fact that at the same time the load and the starter brush-commutator assembly will increase, which will reduce its service life.
Battery polarity When purchasing a battery for a VAZ 2107 injector, you need to take into account the position of the plus and minus terminals, for example, “plus” on the right or left .
Overall dimensions of the battery You must immediately check the dimensions of the battery in the accompanying documents or measure the dimensions of the “native” one that is on the car yourself.

Also read other reviews

Battery for VAZ 2107. We choose for every taste and color! Author: Welcome to the website of the Electromotor company. My name is Anna, and today we will talk about how to choose a battery for a VAZ 2107. If you need a rechargeable battery and you have come to our website, then the direction has been chosen correctly, which is already good.

I'll try to help you. You need to start by determining the most important parameter - battery capacity. The capacity is indicated in Ampere/hours and you can find out this indicator by carefully reading the passport for the machine, where all the recommended parameters are indicated. If you cannot do this, then it will be most convenient to inspect the old battery.

Criterias of choice

When choosing a battery for a VAZ 2107, you should consider the following factors:

The capacity can vary from 45 A/h to 65 A/h. For winter, when a large starting current is needed, products with a capacity of 55-65 A/h are purchased.

The battery for VAZ 21074 has a positive terminal on the left, so the polarity must be straight.

Dimensions of the VAZ 21074 injector battery: 242x175x190.

When choosing a battery, you should take into account the engine model. For the VAZ 2107 injector and carburetor it has some differences.

When purchasing a new product, you must check its functionality and inspect it for mechanical damage.

Determining the polarity of the battery

The next indicator is polarity. Polarity can be direct or reverse.

This is reflected on the battery by the location of the terminals: Left (L) + left plus, Right (R) + right plus. The starting current usually depends on the battery capacity. Often, these two indicators are proportional: the larger the capacitance, the greater the inrush current, although there are exceptions. Next we decide on the sizes. It is best to take approximate measurements yourself, then the picture of battery selection will be clearer, since based on approximate parameters we will be able to select a standard type for you. Selecting a battery for a VAZ 2107 is not such a difficult task.

I can outline some standard parameters that are suitable for this type of machine. Suitable battery models for VAZ 2107: The Electromotor company can offer you a wide range of batteries for any car, for every taste and color. Our company offers to purchase batteries of both Ukrainian and foreign production.

Among domestic manufacturers, these are Dnipropetrovsk: ISTA and WESTA. Among the foreign ones are: VARTA P and BOCSH, which are produced at the best European factories. It cannot be said that some batteries are worse and some are better. All presented batteries are of very good quality. Indeed, the price of Ukrainian batteries is lower, but only due to the territorial factor, since transporting batteries from Europe is much more expensive.

The Electromotor company wants and can offer you a battery for the VAZ 2107 at the lowest prices. And this does not mean that we sell cheap copies; all batteries have official warranty cards and all production details are stamped on each one. Contact us by phone: (044) 5 000 888, and we will help you choose a battery for your VAZ 2107. We will be glad to hear from you! Good luck and see you soon!

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Common faults

Charging arrow on the seven

During operation, the following device malfunctions are possible:

There may be a faulty starter or alternator. If the starter malfunctions, an additional load is placed on the battery, since more electricity is required when starting the engine, so the VAZ 2107 may not be charged enough. If the generator does not work, the battery does not receive recharging, but only consumes electricity.
Mechanical damage causes the device to leak. They are detected by visual inspection.
If the battery discharges quickly after recharging and the battery lamp may come on, the charging pattern may be disrupted. It is possible that the charging current parameters were incorrectly set or the charging time was insufficient and the battery did not have time to fully recover.
If the battery is very discharged, the car arrow starts to jerk, the battery light comes on, this means that the device needs to be recharged.

If you charge your VAZ 2107 battery on time, then it will last longer. It is also necessary to perform maintenance at least once a year.

Carburetor or injector

Examples of choosing batteries for the VAZ 2107

Starting capacity The starter at the braking torque during startup consumes a current of about 350-400 A, then a normal engine start when the starter is running for 10 seconds takes about 400A*10s = 1.1Ah, which is equal to 2% of the capacity of a standard 60Ah battery.
Starting current (starting current) The second important parameter of the battery is the starting or starting current, the value of which determines how long the battery can “crank” the engine when starting, which is especially important at low temperatures in winter. When purchasing, you should always give preference to the battery model where the starting current value is higher. However, it is worth taking into account the fact that at the same time the load and the starter brush-commutator assembly will increase, which will reduce its service life.
Battery polarity When purchasing a battery for a VAZ 2107 injector, you need to take into account the position of the plus and minus terminals, for example, “plus” on the right or left .
Overall dimensions of the battery You must immediately check the dimensions of the battery in the accompanying documents or measure the dimensions of the “native” one that is on the car yourself.

Battery starting current

This parameter characterizes the power of the battery and indicates the maximum current that the battery is capable of delivering. The higher the current, the better the starter will start the engine in the cold. In the southern regions, batteries with average starting current are sufficient, while in the north you need to install batteries with a high starting current.

VAZ 2107 battery dimensions

Under the hood of the VAZ 2107 there is a special platform for installing the battery. When selecting a battery, you must take into account its size and the distance between it and the hood. A large battery will not fit on the platform and cannot be securely fixed. The size of a standard VAZ 2107 battery is 242x175x190 mm. Most batteries with a capacity of 50-60 Ah on the market fit into these sizes. However, it is better to check the battery dimensions before purchasing.

VAZ 2107 battery price

This indicator depends on the manufacturer, quality, capacity and other parameters and circumstances. It is better to buy a relatively expensive battery from one of the well-known brands (Bosch, Mutlu, etc.) and know that there will be no problems with starting the car for the next 7 years. You can save money and buy a less “branded”, but no less high-quality battery from simpler manufacturers. The only thing I would like to warn against is buying cheap batteries from unknown or little-known manufacturers. In this case, there can be no question of any guarantees of quality and compliance of the battery with the declared characteristics. Accordingly, excessive savings will result in unnecessary expenses.

It is not difficult to purchase a VAZ 2107 battery; the batteries for this vehicle are standard and are available for sale in any car store. But it should be noted that it is important to carry out the purchasing process after preliminary preparation. There are a number of nuances related to the location of the terminals and the type of equipment itself.

Maintenance or maintenance-free type – which is better?

Of course, by all criteria, modern models that do not require topping up with distilled water are better. Resistant to deep discharges, cold, and have high electrical performance. These include devices:

Calcium;
Hybrid (Ca/Sb);
EFB (with thicker lead plates housed in fiberglass pockets filled with electrolyte).

Make sure the polarity is correct.

Acceptable battery dimensions are 242x175x190 (length, width, height).

It is not necessary to purchase an imported solution. Russian models provide worthy competition to foreign models. Tyumen Standard car batteries have proven themselves well . Ideal for cars with a minimum set of on-board electronics, reliable and relatively inexpensive, with a charge indicator on the body.

Source

Transferring the battery to the trunk

On the VAZ 2107, the power supply is normally located under the hood. Some owners of “Sevens” and other “classics” transfer the battery to the trunk, explaining this with the following advantages:

more space under the hood, which is important when planning car tuning;
the location of the battery in the trunk prevents it from severe freezing at sub-zero temperatures, which will ensure easier engine starting in winter;
Battery protection against theft.

Regardless of your goals, you need to take into account that getting the battery out if the trunk is fully loaded will not be easy. In addition, harmful fumes are released from the energy source. To carry and securely secure the product in the luggage compartment of the “seven” you will need:

platform for the battery;
terminals for battery contacts;
tips for mounting the mass;
battery fastening;
cable with a cross section of 25 mm² and a length of 6 m.

Photo gallery: consumables for transferring the battery to the trunk

The procedure for transferring and installing the battery in the trunk boils down to the following steps:

We drill holes for the battery platform in the trunk.
We lay the cable from the luggage compartment to the engine compartment through the passenger compartment (the length should be enough to reach the solenoid relay on the starter).
We press the tip onto the wire and screw it to the relay.

Starting current

When determining this parameter, you need to take into account the region in which the car is constantly used. For example, if the car is used on a regular basis throughout the year in sub-zero temperatures, then you should opt for a more powerful battery. The lower the air temperature at which the engine starts, the more power is required.

The optimal solution would be a parameter of 600 A. For the southern regions, a value of 550 A is more suitable. There is a proportional dependence of the ability to start the engine on the ambient temperature.

Charging the battery

If you do not have the opportunity to change the battery, we recommend purchasing a charger for it so as not to find yourself in an unexpected situation. It should be for a 12-volt battery with the ability to increase the voltage to 16 volts and charge any battery capacity.

The charging circuit is simple: we connect the positive wire of the device to the positive terminal of the battery, and the negative wire to the negative terminal.

The easiest way to charge a VAZ 2107 battery is to charge it at a constant voltage. That is, the higher the voltage the charger provides, the faster the battery will charge to 100%, as the indicator light on the device will tell you. In a day, a 12-volt battery can be fully charged only at a voltage of 16 volts. As the battery charges, the voltage of the device decreases and at the end it is approximately 14 volts. An indicator will indicate the end of the process. When you notice that the green light is on, it means the battery is fully charged. Everything happens automatically, so there is no particular need to constantly be in the garage.

We look at the electrical characteristics

The most important selection parameters are the capacity and strength of the starter current. First of all, we pay attention to these indicators.

The first talks about the uninterruptible power supply time under a certain load. Values are traditionally indicated in ampere hours. Based on them, they find out the strength of the uniform discharge current until the voltage drops to 10.8 volts. In this case, the discharge duration is set to 20 hours.

A battery with a capacity of 55 - 60 A/h is suitable for our car.

The second is the current value required to reliably start the engine, including at sub-zero temperatures. Thus, the battery for the VAZ-21074 requires 460 A. The optimal option is 480 - 520 A.

Battery related problems

While operating the Seven, the car owner may encounter problems with the battery. In most cases, they come down to charging problems. The most common reasons for lack of recharging are a broken belt or failure of the generator diode bridge, relay regulator, or battery charge circuit fuse.

How to install correctly on a car

Removal and installation of the power supply on the VAZ 2107 is carried out in most cases when recharging, replacing a part, or carrying out repair work in the engine compartment, if the presence of the battery will interfere. To install the battery you will need keys 10 and 13. When everything you need is at hand, you can begin installation:

Open the hood and install the battery in the designated place.
We first connect “+” and then “-” to the battery and tighten the fasteners. It is worth considering that the negative terminal is slightly smaller in diameter than the positive terminal.

What happens if you reverse the polarity?

Although the terminals for connecting the energy source have different diameters, sometimes there are situations when car owners manage to confuse the polarity. If the battery is connected incorrectly on a VAZ 2107, the diode bridge of the generator and the voltage regulator may fail, and some fuses may blow. An incorrect connection cannot be overlooked because it causes smoke and a burning smell. If such a problem occurs, you must immediately disconnect the terminals from the battery to avoid serious consequences.

The battery discharges quickly

One of the problems that manifests itself on the VAZ 2107 and other classic Zhiguli models comes down to the battery being discharged after parking, that is, literally overnight the power source is discharged to such an extent that it is unable to crank the starter. The reason for this phenomenon lies in insufficient battery charge or high leakage current. First you need to check the following:

integrity of the charge relay fuse;
reliability of fastening the terminals to the battery;
the voltage value at the battery and at the generator output;
condition and tension of the generator belt;
cleanliness of the voltage regulator terminals and the condition of the brushes.

In addition, you need to pay attention to the charge indicator lamp: it should go out immediately after starting the engine. If the lamp does not go out and the battery is discharged, there may be several reasons:

malfunction of the relay regulator;
wear or sticking of brushes in the brush holder;
failure of one of the diodes in the generator.

On the VAZ 2107, the battery charging circuit is designed in such a way that the charging indicator lamp is located along the generator excitation circuit. When, when starting the engine, the voltage supplied by the generator exceeds the voltage on the battery by 0.1 V, the lamp goes out. However, this does not mean that the required level of charge is supplied to the battery, since even if the light bulb goes out, the power source may be discharged. In this case, it is recommended to check the voltage at the battery terminals with a multimeter.

If the test showed values in the range of 13.7–14.2 V, then there are no problems with the charge. In case of rapid discharge, a possible cause may be a large leakage current.

Battery leakage current is a parameter indicating the self-discharge of the energy source when the vehicle is parked with the engine turned off and consumers turned off. Depending on the strength of the leakage current, not only the battery may discharge, but also the wiring may catch fire.

On a “seven” with a working electrical part, the leakage current should not exceed 0.04 A. With such values, the car should start even after a long period of parking. To measure this parameter, you must disconnect the positive terminal from the battery and connect a multimeter into the open circuit at the current measurement limit, while all consumers must be turned off. If during the test it was revealed that the leakage current is about 0.5 A, then you should look for the cause and eliminate it. In addition, you should not exclude the battery itself from attention - perhaps its service life has come to an end.

Video: measuring battery leakage current

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The battery determines how quickly the car will start and how electrical appliances will operate when the engine is not running. Therefore, it is important to choose the right device. The article discusses the battery for the VAZ 2107 car: what parameters should be taken into account when choosing, what are the main faults.

What to do if the battery is dead

If charging does not occur, the lights are dim, or do not light at all when the generator is turned off, urgent action must be taken. The following methods can be used:

use a starter-charger - but not all drivers have this;
contact other vehicle owners - connect your car to the battery;
try to start the engine “from the pusher” - in this case the generator shaft will be spun up by the cranking engine.

It is important to remember: the battery has its own resource. It depends on the parameters of the device itself, as well as the operating mode. But it is worth noting that if the battery has stopped charging, then it will most likely be simply impossible to restore its operation. It is best to purchase a new battery from a reputable auto store.