What Size Battery Do I Need for My Key Fob?
Keys for vehicles have come a long way from the key to a physical lock and have evolved into key fobs that accomplish everything that a physical key does and more.
Nowadays, key fobs not only unlock your car and pop the trunk but can start your car and even enable you to control the temperature while your car is still warming up, all from a few button clicks.
All of these features require a power source to operate, and that is where a battery comes in.
But what size battery do you need for your key fob?
In this article, we will explore the different types of key fobs, the batteries they use, and how to replace a key fob battery.
Types of Key Fobs
There are two main types of key fobs: passive and active.
Passive key fobs only work when they are close to the vehicle.
They use radio frequency identification (RFID) technology to communicate with the vehicle’s immobilizer system.
Active key fobs, on the other hand, can work from a distance.
They use Bluetooth or Wi-Fi to communicate with the vehicle’s computer system.
Active key fobs can perform more functions than passive key fobs, such as starting the vehicle remotely.
Batteries Used in Key Fobs
The type of battery used in a key fob depends on the type of key fob.
Passive key fobs typically use CR2025 or CR2032 coin batteries.
Active key fobs typically use CR2450 or CR2430 coin batteries.
Some key fobs may use other types of batteries, such as AAA or AA batteries.
It is important to consult your vehicle’s owner’s manual to determine the type of battery that is required for your key fob.
How to Replace a Key Fob Battery
Replacing a key fob battery is a relatively simple process.
First, you will need to locate the battery compartment.
This is usually located on the back of the key fob.
Once you have located the battery compartment, use a small screwdriver or coin to open it.
Next, remove the old battery and insert the new battery.
Be sure to insert the new battery in the correct orientation.
Finally, close the battery compartment and test the key fob to make sure that it is working properly.
Tips and Expert Advice
Here are a few tips and expert advice for replacing a key fob battery:
- Use a new battery.
Do not use an old or used battery, as this could damage the key fob. - Make sure that the battery is inserted in the correct orientation.
If the battery is inserted incorrectly, it could damage the key fob. - If you are having trouble replacing the key fob battery, consult your vehicle’s owner’s manual or contact a mechanic.
FAQs
Here are some frequently asked questions about key fob batteries:
- How often should I replace my key fob battery?
The battery in a key fob typically lasts for 2-3 years.
However, this can vary depending on the type of key fob and how often it is used.
If you find that your key fob is not working properly, it may be time to replace the battery. - Can I use any type of battery in my key fob?
No, you should only use the type of battery that is specified in your vehicle’s owner’s manual.
Using the wrong type of battery could damage the key fob. - How do I know if my key fob battery is dead?
If the buttons on your key fob are not working or if the range of your key fob is decreased, it may be a sign that the battery is dead.
You can also test the battery using a multimeter.
Conclusion
Replacing a key fob battery is a simple process that can be completed in a few minutes.
By following the tips and advice in this article, you can ensure that your key fob is always working properly.
If you have any questions or concerns, please consult your vehicle’s owner’s manual or contact a mechanic.
Is there any other information that you would like to know about key fob batteries?
Let us know in the comments below.
