How to Test A Battery- Necessity and Methods

Aug 07, 2020   Pageview:81

In this era of technological advancements, batteries have become a necessity for almost every person. We are surrounded by things that are using different types of batteries as a portable power source. From a phone to a car, almost every machine in our life has some sort of battery. These batteries also have a life and when they reach their limit, they become faulty or sometimes dead.

Testing a battery is a very good practice that can tell you a lot about the health of the battery. It has certain benefits as well. One of the benefits is that you take care of your battery when you know its condition. This helps to increase the life of your battery. Here we will discuss the need and methods of testing a battery.

How do you tell if a battery is still good?

When you are testing a battery, it is very important to know if it is still good or not. Because in the worst case, you might unknowingly replace a good battery. Here are some simple checks that will tell you if your battery is still good or not.

Rate of charging and discharging.

The time a battery takes to charge, and discharge also speaks a lot about your battery`s health. If the battery is taking too long to charge or it charges very quickly, then there are good chances that your battery is not good anymore. This is the time when you need to change the battery.

On the other hand, if the battery discharges very quickly or loses a lot of power when it is left idle for a day or two. This means that your battery is not good. Other than these situations, the battery is in good condition.

Ample Voltage output.

The first thing that will tell you if a battery is still good is the voltage output. Every size and type of battery has a safe voltage range rated for the battery. This tells when the battery has gone bad. If you do not know the voltage rating of your battery, you can check for it on the internet. With the help of a voltage meter or a multimeter, you can check for the voltage of the battery.

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If there is a big difference between the voltage of the battery and the rated voltage range, then the battery is not good. Otherwise, the battery is good.

Is it necessary to test a battery?

While testing a battery is a very easy job to do, some people still come up with the questions that is it necessary to charge the batteries. Here we will tell you why testing batteries is necessary


Backup batteries must never go bad.

Backup batteries are the batteries that are used for providing power to different things. These are used in home backup systems, cars, and other small appliances. These batteries are needed because they can provide instant power and they can provide enough power delivery for hours. Because these batteries are used to provide instant power backup, they must never go bad.

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In most cases, the backup batteries are either dry or acid. In the acid batteries, it is necessary that you keep testing the acid levels of the battery. Keeping the acid level good helps to maintain the battery for a longer time. In the dry batteries, proper testing and maintenance is?

required as well. This is because sometimes carbon accumulates on the connections of the battery and it can destroy the connection terminals.

Some batteries are dangerous if they go bad.

The flat cell batteries like smartphone batteries are very dangerous if they swell. This usually happens when a battery is used for a long time. It is best to keep your flat cell batteries being tested after some time. This will help you in knowing when the battery needs to be changed.

When you change the batteries on time, this will help in keeping you safe from any kind of dangerous incidents like a fire or explosion.

How do you test a battery?

There are many ways of checking a battery for its health. All these methods can be very helpful for knowing the quality and health of the battery, some of them are discussed below.

Check the structure of the battery.

One thing that is very easy to tell is the structure of the battery. In most of the dry and acid batteries, the structure of the battery charges when the battery gets bad. The batteries that are usually used for backup power in houses or as power sources in cars with combustion engines swell from the sides. This tells that the battery has gone bad. This is also a symptom of lower health of the blat batteries that are used in mobile phones, tablets, and some laptops.

Check the temperature of the battery while usage.

The batteries provide electric energy because of some chemical reaction taking place inside them. This makes the batteries a little warm sometimes. But if you notice that the battery is getting very hot when being charged or being used, this means that the battery needs to be replaced.

Check if the battery loses a lot of power when left idle.

Another sigh to check the battery is by charging it and then leaving it idle for a day or two. Generally, batteries lose their charge but in starting it is very fast and it slows down. After some time, the battery stops losing charge.

This is the case with healthy batteries. If the battery has gone bad, it starts to lose charging very quickly. There are good chances that the battery needs to be replaced when it starts to lose charge quickly.


Keeping the batteries healthy and replacing the bad ones as soon as possible must be your priority. Here we elaborated some tests, checks, and tips that will help you in assessing if your battery needs to be replaced or not. We also enlightened some facts that will tell you the importance of checking and testing the battery.

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