Electrolyte for batteries. Density, level, replacement

Now modern cars and their components are very reliable. Batteries in the car are also no exception. But many people forget that reliability is not a guarantee of durability. In order not to happen that, being somewhere on the empty highway, your car stopped to start, you need to at least occasionally carry out diagnostics and measure the electrolyte level in the battery.

Proper battery maintenance

The battery in the car performs the function of providing the required amount of starter electricity during engine start. Also, the battery provides electricity to the entire electronic system of the car.

Battery ElectrolyteThere are four types of total batteries:

  • Serviced.
  • Low maintenance.
  • Hybrid.
  • Unattended.

In order for the battery to last for a long time and not let you down at an unexpected moment, it must be properly and timely serviced.

One of the most important points for maintaining a working condition is the electrolyte for batteries. Behind him should be monitored first.

The second, equally important point in the battery is the density of the electrolyte. It is checked using a special device - a densimeter or a hydrometer. Depending on the season, the density of the liquid should be different.

Recommended electrolyte density in the battery
Climatic areas Season Electrolyte density, reduced to 25 ° C, g / cm³
Poured into the battery Charged battery When the battery is low
25% 50%
With temperatures in winter below -40 ° C Winter 1,28 1,30 1,26 1,22
Northern with temperatures in winter down to -40 ° C All year round 1,26 1,28 1,24 1,20
Central with temperatures in winter up to -30 ° C Same 1,25 1,27 1,23 1,19
South Same 1,23 1,25 1,21


Also, the battery needs to be constantly checked for its voltage. You can check the voltage in the battery with a voltmeter, multimeter or load plug.

How to check the electrolyte level

The electrolyte for batteries in a heat tends to evaporate, as its main component is water. Also its evaporation is implicated and the battery boils during operation.In this regard, its level must be checked constantly. In the summer heat, a monthly check would be perfect.

You can check the level visually if the material of which the battery case is made up allows (it should be transparent). If you can not visually determine the right, you need to find a special label on the body. With their help, you can also try to establish the level of electrolyte.

If none of the above methods helped, you need to unscrew the plugs on the battery and use the glass tube to determine the amount of liquid.

You need to do it this way: lower the glass tube into the filler hole, so that it rests on the plate grid above. Cover the top of the tube with your finger, pull it out and measure the liquid level. It should be about 10-15 mm.

Battery electrolyte levelIf the required amount of liquid is missing, it is necessary to bring it to the desired level and measure it again. It is necessary to check separately in each battery bank.

Please note: if the battery level is below normal, then it is necessary to refill not electrolyte, but distilled water. When boiling water from the electrolyte increases the density.When refilling distilled density will return to normal.

If, however, to add electrolyte and leave the density high, this will lead to a rapid failure of the battery in a short time.

From what electrolyte in the battery you have filled and how you serve it, depends on the battery life.

Volumes of electrolyte in different batteries

If you purchased a dry-charged battery or for some reason decided to change the electrolyte in your battery, you need to know the required amount of liquid that we need.

How much electrolyte in the batteryBefore refueling, the battery must be purchased at a nearby store or you can make your own battery electrolyte. It is better to use it with a margin, as when charging the battery some amount of liquid will be absorbed into the plates, which will lead to a decline in the level, and you will need to top up the electrolyte.

So how much electrolyte should a battery have? Its volume is determined by the type of your battery, which is listed in the table.

The required amount of electrolyte
Battery Type Volume in liters
45 A 2,7
55 A 3,4
60 A 3,4
75 A 4,1
90 A 5,4
190 A 10,5

Independent electrolyte preparation

If you didn’t have electrolyte on hand when checking the fluid level in the battery, you can prepare it yourself.

What is the electrolyte in the battery?To prepare the liquid, we need sulfuric acid mixed with distilled water in a strictly defined proportion.

When preparing the electrolyte, it is necessary to use pure materials and observe safety precautions, since acid can cause irreparable damage to your health when mixed with water.

Pay attention that acid pours into the water in a thin stream, and in no case is it the other way around. This can cause a sharp reaction and boil water, which when spraying can fall on you.

Prepare the electrolyte for batteries is easy, knowing certain proportions, but still it is better to buy it in the store, as it is inexpensive.

Battery maintenance is easy. If you know all the necessary parameters of the fluid and timely diagnose them, you can keep your battery in working condition, and it will serve you faithfully for a long time.

Related news

Electrolyte for batteries. Density, level, replacement image, picture, imagery

Electrolyte for batteries. Density, level, replacement 67

Electrolyte for batteries. Density, level, replacement 32

Electrolyte for batteries. Density, level, replacement 34

Electrolyte for batteries. Density, level, replacement 86

Electrolyte for batteries. Density, level, replacement 78

Electrolyte for batteries. Density, level, replacement 26

Electrolyte for batteries. Density, level, replacement 27

Electrolyte for batteries. Density, level, replacement 67