Car batteries are essential components of vehicles because they perform vital functions that ensure that the car is moving. The main role of the car battery is to start the engine. Once the engine is on, the alternator takes over and charges the battery to an optimum level that will be enough for the next ignition. However, as time goes by, car batteries usually die, and it becomes harder for the battery to start the engine of the car. A failed car start can be very disappointing especially when the reason behind the death of the battery is not apparent.
The points explained below highlight some of the main reasons as to why do batteries die-
1. Batteries Die Because of Electrical Parasites
Electrical parasites are the electrical components that consume unnecessary power from the battery when the engine is on or off. A faulty alternator is one such example that can significantly affect the life of a battery. If the alternator is not able to charge the battery to full capacity, the battery will frequently die even if the weather conditions are favorable for optimum battery charging.
2. Batteries Die Because of Human Error
Sometimes we leave work and head home straight, and in the process, we forget the headlights on. It is in the morning when we want to rush for work that we remember that we forgot the lights on. It is very common for people to commit this mistake especially when they leave their workplaces while feeling tired and exhausted.
To prevent this mistake, one should unplug the car battery from the engine to give the battery a break then plug the power cables back to the battery terminals in the morning before leaving for work.
3. Batteries Die Because of Cold Weather
Cold weather is probably the main reason why most car batteries die. Cold weather weakens the battery because it cools the engine making it require more electrical energy to warm up.
Additionally, cold weather reduces the cranking power of batteries and also thickens the motor oil making it hard for the engine to turn over. With repeated cranking struggles over a prolonged cold weather, most cells die slowly.
4. Batteries Die Because of Old Age
On average, the lifespan of a car battery varies between three to five years. As the battery ages with time, it reaches a point where no amount of jumping can bring it back to life. Batteries of cars operating in cold regions tend to die earlier compared to batteries that are serving in warmer areas.
It is therefore advisable to test the battery regularly to know its status as time progresses. Monitoring the battery periodically is essential because it prepares someone to purchase a new battery earlier enough before the current aging battery dies flat.
5. Batteries Die Because of Corrosion
The sulphuric acid that forms the main component of the battery electrolyte is corrosive. The acid usually corrodes the terminals of batteries with time, and this affects the level of power transfer between the alternator and the battery.
When the sulphuric acid corrodes the terminals to a more considerable extent, the battery struggles to charge from the alternator, and it starts to die slowly. If the corrosion is too much, the battery will always be undercharged, and this will start damaging its cells leading to its death.
In summary, it is vital that one understands why do batteries die so that preparations to purchase a new battery begin early enough before the battery dies completely.