Many car owners face the problem when a car battery doesn’t hold its charge. Very often, car owners face this problem during winter. There is a number of various reasons for it. Before we start talking about them in details, we want to speak a little bit about the construction of a car battery.
A car battery consists of 5-6 cells that are called cell jars. Inside each of them, there is a lead plate that is deep in acid electrolyte. When lead plates come in contact with the acid, the electricity is being accumulated. Various devices of a car, then, use this electricity.
All the cell jars are connected with each other. They are your car battery. If one of the cell jars is out of order, it will lead to the situation when a car battery as a whole is losing its functionalities. It is one of the most common reasons for why a car battery doesn’t hold its charge, especially, if a car battery has been used for more than 2 years.
Why A Car Battery Is Not Holding A Charge
As for a cell jar being out of order, there are 2 main reasons for it: There is either electrolyte evaporated or a lead plate is broken. In the first case, you will only need to pour the necessary amount of electrolyte inside the battery to fix the cell jar. In the second case, there is no use in trying to fix your car battery. It is easier to buy a new one.
How To Fix It?
Still, there may be other reasons for why a car battery not holding charge. As a rule, there is one of the following reasons:
- Defects in a car signalling system due to which car battery is discharging fast while your car is at parking lot;
- Defect in a charging relay results in the situation when electricity from alternator doesn’t get inside a car battery. It’s not easy to detect such like defect. You need to turn on the headlamps and sharply increase the engine speed. The light should become a bit brighter. If it doesn’t happen, you need to change charging relay;
- There may be a defect in the electric generator. In order to detect such like defect you need to measure the voltage. As a rule, it should be 13,6 V. Decreased or increased voltage may have a negative influence on a car battery.
Actually, the reason for fast discharge of your battery may be quite banal. It’s quite likely that there is a loss of electricity the power supply. In order to find out if it’s so you need to check the battery terminals. Check if they fit snugly and if they are corroded. You also need to check the electrical wiring. See if there are any thin places and if the insulation is damaged.