Car battery voltage: measurement, voltage and amperage

Your vehicle's battery is the centerpiece of its starting. Indeed, this allows you to provide the energy needed to start the engine and then use all the electrical accessories. For optimal battery performance, a certain voltage must be maintained.

⚡ How does a car battery work?

Your car's battery has two different functions. On the one hand, this allows turn on engine с starter... On the other hand, she supplies electricity to electrical and electronic components a car.

Specifically, a battery has two electrodes, one positive and one negative, both filled with sulfuric acid, also called electrolyte. When the positive and negative terminals are connected, their difference moves electrons from the - terminal to the + terminal.

Thus, it allows electricity to be generated and transported in a car. Thanks to generator and kinetic energy, the battery is charged while driving.

🛑 What is the amperage of a car battery?

The strength of a car battery refers to its electrical power. Expressed in amperes. Currently, most passenger cars have a battery with voltage 12 volts... The higher the amperage, the more power the battery has.

We usually talk amperage per hour analyze the capacity of the battery to provide the vehicle with electric current when recharging from the generator.

As you can imagine, the battery amperage will correspond to engine power requirements... For example, a city car usually has a battery with a capacity in amperes in hours (Ah) between 70 and 75 Ah.

Therefore, when replacing the battery in a car, it is important to select the correct amperage in order not to damage the engine or burn the battery. It is listed on your car's battery, but you can also find it in the service log. The latter contains all the recommendations of your car manufacturer.

🚘 What is the voltage of the car battery?

When we talk about the voltage of a car battery, we are talking about voltage... As a general rule, battery with normal voltage of about 12,7 volts and it must not go below Volt 11,7... When stopped, the battery voltage must be between 12,3 and 13,5 volts.

If your battery voltage drops below Volt 10, this means that your battery is sulfated. You will notice this because there will be a white coating on the positive lead of this cable. Lead sulfate crystallizes.

This happens if you don't charge the battery regularly. To measure your car's battery, you will need multimeter and connect the red wire to the positive terminal and the black wire to the negative terminal. If it is unloaded, you can test 3 different options:

• Connect the battery to another car : possible thanks to the pliers. The other car must be powered by the engine so that the battery can transmit electricity to yours, which is discharging.
• Call on battery booster : It must be pre-charged and will provide the battery you need to start.
• Use Charger : This solution allows you to fully charge the battery. However, you need to be patient until the battery is fully charged.

If none of these options work, then your vehicle's battery needs to be replaced.

💸 How much does a car battery cost?

A car battery is not one of the most expensive parts of your car. On average, it takes 100 € and 300 € depending on car model and battery power. Indeed, the more powerful they are, the higher their price will be.

If you want to buy a battery yourself, you need to take into account the manufacturer's recommendations regarding the voltage and amperage of this battery.

If you install a battery that is not powerful enough or too powerful, this can have serious consequences. Also, if you walk through the garage to make changes, it will take between 35 € and 50 € work.

The voltage of your car's battery is an important metric as it monitors its good performance and the power it has to offer. Protect your battery by parking your vehicle in a dry place away from temperature extremes. You must also use your car regularly, otherwise your battery could be drained from inactivity.