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The battery requires either warming up or recharging. It is worth noting that the batteries are able to restore their voltage over time, but under certain conditions: if the battery was discharged by high short-term loads you turned the starter and tried to start. In this case, if you let the battery stand and recover, then most likely you will have enough for a couple more attempts to start the engine. But if the battery sat down under the influence of a prolonged load, albeit a small one for example, a radio tape recorder or a charger in a cigarette lighter , then after this, the battery will most likely not be able to restore its charge and will need charging.
First name. Audi BMW. Citroen Fiat. Ford Honda. However what voltage your battery should be at any given time is dependent on:. This is why a weak battery is often discovered in winter when you are about to set off to work on a cold frosty morning! Age: As your battery ages and is used, its ability to hold charge will diminish, with a resulting decrease in the voltage.
State of charge: The voltage of your battery will change as it is charged and discharged. Understanding at what point it is in a charge cycle is important when determining what the voltage should be. If the cars engine is running or not: The batteries voltage will be higher when the engine is running.
You can check a car battery voltage with a multimeter or buy a car battery monitor. Both are relatively cheap and easy to use. Check out our guide on checking a car battery with a multimeter. Knowing your car batteries voltage is important in understanding the condition of the battery and the likelihood that it could fail. When you start your car the battery provides the high energy current needed to the starter motor, which in turn turns over the engine.
Once the engine is running the power for your cars electrical systems is provided by the alternator. The car battery also stabilizes the circuit voltage of the car when the engine is running, protecting the electrical systems from voltage spikes. Without a fully functioning battery you run the risk of being stranded and unable to start your car.
We advise that you check your car battery a couple of times each year, and in particular towards the end of autumn before winter sets in. It is worth keeping a noted of the voltage readings so you can compare them overtime. Read our full guide on car batteries. Hi, thanks for the informative article. What would the car battery voltage be of different battery technologies? Hi Mark, thanks for the message.
Most modern car batteries are AGM absorbed glass mat , if you want us to specifically check the tech details for a battery you have then email us on advice tontio. Hi John. You can use the same car battery voltage readings as a guide. Stop-start car batteries are different to standard car batteries as they are designed for higher number of cycles and for increased energy demands. If you want to make sure that your battery is powered with the right amount of voltage, follow these easy and simple steps on how to measure your car battery voltage.
With all the information on what should a car battery voltage be and how to measure the car battery voltage, you are now on the road to have a safe and healthy car battery.
Your additional knowledge on this matter will help you have the best ride experience with your car. You can send us a note too. These are the following recommended amount of voltage your car battery should have according to car experts: When fully charged — not lower than The first and most important step is to protect yourself from the possible harm this process can cause.
Ensure your safety by wearing gloves on both hands and a piece of eye shield. Fully charged automotive batteries should measure at When the engine is running, this measurement should be If they are dim, that indicates the lights are running off the battery and that little or no charge is being produced by the alternator.
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