How to choose a car battery if you don't want your car to be on the road

The battery acts as the "heart" of the electrical system on a car. The most important role of the battery is to provide power to the starting system (starter), helping to start the engine. In addition, it also has the role of providing supporting power in case the load (radio, air conditioner, car lights, ...) uses a current exceeding the rated current of the generator. Unlike motorbikes, modern cars do not use a kick starter to start the engine in case the battery runs out, so the role of a good battery becomes more important than ever.

In addition, the "car battery" is responsible for running auxiliary devices such as radio, air conditioner (car), lighting system, horn, (motorbike) ... when the engine has not started. Once the engine has started, the vehicle's power source will be provided by the vehicle's generator, the battery will be recharged and have power reserve in floating charge mode.

Therefore, when choosing a battery for a car, drivers must not make the following mistakes because it can damage the car and endanger life.

Car battery is very important part of car need to note when choosing.

Battery selection must be appropriate for each type of vehicle.

Most car batteries are lead-acid batteries, using negative plates (made of lead Pb) and positive plates (made of lead oxide PbO2) immersed in a sulfuric acid solution H2SO4). Lead-acid batteries are divided into two main types: open batteries (water batteries) and sealed batteries (dry batteries). Water batteries provide stronger current, suitable for vehicles with large starters such as trucks, but require more time to maintain and add distilled water. In contrast, dry batteries are more expensive, provide weaker current than dry batteries but do not require maintenance and can only be used once until the battery runs out. Therefore, dry batteries are more widely used and popular, from motorbikes to small cars.

Choosing the right battery size

Batteries are manufactured in a wide range of sizes and electrode locations. Choosing the right size battery is important to ensure the easiest and most reliable installation and operation. To be sure of the battery size, check your vehicle's owner's manual. Many stores and dealers will replace and install the battery for free after purchasing a new battery there.

Pay special attention to battery voltage and charge.

These are two important parameters that affect the stable operation of the battery. Voltage is the difference in potential between the two terminals of the battery. Battery voltage can be 12V or 24V. To know the exact voltage of the battery, refer to the vehicle's owner's manual or based on the old battery. If the vehicle's electrical system only requires a 12V battery, but we use a battery from a heavy truck with a voltage of 24V, it can damage the entire system.

The reason is that between the generator and the battery, as long as the generator voltage is higher than the battery voltage, the battery will be charged. Otherwise, the battery will discharge to the vehicle's electrical system. This situation, if prolonged, will lead to damage to the battery, generator, and electrical equipment on the vehicle. Therefore, it is necessary to choose the right battery with the right voltage for the vehicle.

Choosing a battery must have a brand

The battery market is witnessing competition from many large and small brands. That makes many consumers confused, not knowing which manufacturer's products to use. Many people often do not pay attention and are stingy with money, so they often choose poor quality batteries, which greatly affects the life of the battery and the car. Therefore, choose battery products from famous brands that have a longer life but they also have a higher price.