How Long Does A Key Fob Battery Last?

Today, the CR battery series is the most commonly used in key fobs, with the CR2032 being the most common. But how long does a key fob battery last?

Key fob batteries typically last three to four years when used regularly. The battery, on the other hand, can survive for 4 to 7 years if you choose to take particular care to extend its life.

So, let’s get started to know more about the key fob battery.

Some Key Fob Examples, Along with How Long Their Batteries Last:

Smart Key Fob: These have a transponder that allows you to unlock your automobile doors without using a key. In most cases, the batteries last three to four years.

Remote Key Fob: These have a transponder that allows you to unlock your automobile doors without using a key. In most cases, these last three to four years.

FOBIK Key Fob: A FOBIK is a remote control that acts as a key to start your car. These batteries have a lifespan of only 2.5 years.

What are the signs that a Key Fob Needs its new battery?

In the long run, failing or defective batteries can be problematic. You can tell if it’s time to replace the key fob battery by looking for these three symptoms.

1. If the Signal strength is Poor

For an SUV or vehicle, the majority of fob keys have a signal strength range of 50 feet. Car owners who want to lock or unlock their vehicle’s doors frequently use this option.

The transmitter range and strength of the fob, on the other hand, will diminish as the battery dies. If your key fob is unable to lock or unlock your vehicle, it will need to be replaced.

Some cars have an automated start button that allows you to start the engine using your key fob. If this does not start on time, the fob’s battery may need to be replaced.

2. When the Key Fob Operates Inconsistently

When you click a button on a key fob, it usually becomes active, suggesting that it is working properly. There are also newer varieties that begin the igniting process.

The fob is usually inserted into a dashboard slot or sends an electrical signal to the vehicle’s ECU. A driver can then hit the start button. This feature’s inconsistency indicates that the battery is running low.

3. Several clicks are required to unlock doors

A key fob normally only requires one click to unlock your vehicle’s doors. It may be necessary to make a few more clicks at times. If this is the case, the battery is failing and must be replaced before it dies.

It’s vital to keep in mind that entirely draining your key fob battery may cause the sensors to reset. They won’t be able to connect with your car if this happens.

Tips For Extending the Life of Your Key Fab Battery

The battery will not survive indefinitely, but it will wear out after a few years. The steps listed below will help you extend the battery life of your key fob.

Mode of power conservation: Some key fobs have a power-saving option that allows you to extend the life of your battery. It works by blocking the fob’s ability to receive or transmit radio waves. This feature, however, is only available on automobiles with a push start button.

Storage: If you leave your fob in the car overnight, the signal transmission will drain the battery. The same is true if you hang it nearby vehicles on a hook. Instead of employing those methods, keep it at least 10 feet away from your car, where the vehicle’s computer signal won’t be able to read it.

Sunlight Straightway: Due to heat build-up, placing your key fob in direct sunlight may reduce battery life. Keep it in a dark or cool spot for optimal results.

The Atmosphere Must be Humid: The battery may be harmed if the key fob is exposed to a humid environment. It’s preferable to maintain it in a low-humidity region to keep it safe from harm.

How To Replace A Key Fob Battery?

It’s relatively simple to replace the battery in your key fob. You must first determine whether the battery is rechargeable. This is because replacing a rechargeable battery, such as the VL2020, necessitates the use of additional tools.

If this is the case, you’ll probably need a soldering iron to remove the battery from the circuit and super glue to replace it. A flathead screwdriver and a new battery are required otherwise.

To begin, look over your key fob for the notch that opens the unit. That will either be around the connection point where the key may be removed or in the small space at the top.

Then, take your screwdriver and insert the tip into the notch, prying it open. This will split the fob in half, revealing the round battery.

Once you’ve seen the battery, you’ll need to figure out what kind it is. To do so, carefully examine it, looking for markings that indicate the battery’s model. You can also check your owner’s handbook for this information. Purchase a replacement after determining the type.

Next, remove the battery by popping it out with your finger and replacing it where the old one was integrated.

After installing the new battery, reassemble the key fob by squeezing both sides together. Fortunately, you’ll only have to replace the battery every 4 to 7 years, so this won’t be a frequent task.

How Much Does It Cost To Replace The Battery In A Key Fob?

It is relatively affordable to replace a fob battery on your own. It only costs $3.70 to $9.50, including tax. This, however, is dependent on the type of fob. If you have a unique fob, you’ll need to visit a car dealership that specializes in unique battery kinds.

Some dealerships may only charge you for the battery, leaving the work free. Otherwise, replacing the battery at a dealership won’t be prohibitively expensive. These treatments are available for as little as $9.75 in some businesses.

Final Word

To sum up, it is to note that with typical use, the battery life of most automotive key fobs is three to four years. It’s also important to keep in mind that where you keep your fob can have an impact on its battery life. It’s not a good idea to leave the fob in the car or on a hook near the car overnight.

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