If you own a car with keyless entry, you know how important the key fob is. It allows you to lock and unlock your car, open the trunk, and even start the engine without ever having to take the key out of your pocket. But have you ever stopped to think about the battery inside that little device? If not, you should. In this article, we will cover everything you need to know about battery size for key fobs in 2023.
What Is a Key Fob?
Before we dive into battery size, let's first define what a key fob is. A key fob is a small, electronic device that is used to control various functions of your car. It is usually made up of two parts: the transmitter and the receiver. The transmitter sends a signal to the receiver, which then performs the desired function.
A key fob can be used to lock and unlock the doors, open the trunk, and even start the engine. Some key fobs also have additional functions, such as remote start or panic mode. Key fobs are typically powered by a small, replaceable battery.
Why Is Battery Size Important?
Battery size is important because it determines how long your key fob will last before you need to replace the battery. If the battery is too small, it may not last very long and you will need to replace it frequently. If the battery is too large, it may not fit in your key fob or could cause damage to the device.
Additionally, the battery size can affect the range at which your key fob will work. If the battery is weak, the range may be reduced, making it more difficult to unlock your car from a distance.
What Are the Most Common Battery Sizes for Key Fobs?
CR2032
The most common battery size for key fobs is the CR2032. This is a small, button-style battery that is 20mm in diameter and 3.2mm thick. It is used in a variety of electronic devices, including key fobs, watches, and calculators. The CR2032 battery typically lasts between 2-5 years, depending on usage.
CR2025
The CR2025 is another common battery size for key fobs. It is slightly smaller than the CR2032, measuring 20mm in diameter and 2.5mm thick. It is also a button-style battery and is used in a variety of electronic devices. The CR2025 typically lasts between 2-3 years, depending on usage.
CR2016
The CR2016 is a smaller battery size that is sometimes used in key fobs. It is 20mm in diameter and 1.6mm thick. It is also a button-style battery and is used in a variety of electronic devices. The CR2016 typically lasts between 1-2 years, depending on usage.
How Do I Know Which Battery Size My Key Fob Needs?
To determine which battery size your key fob needs, you can consult the owner's manual for your car. It should have information on the type of battery that is required. You can also remove the battery from your key fob and look for the size printed on it.
If you are still unsure, you can take your key fob to a local automotive store or dealership and they should be able to help you determine the correct battery size.
How Do I Replace the Battery in My Key Fob?
Replacing the battery in your key fob is typically a simple process. First, remove the key from the fob, if it is attached. Then, locate the small seam on the edge of the fob and pry it open with a small tool, such as a flathead screwdriver or a fingernail. Inside, you should see the battery.
Remove the old battery and replace it with a new one of the same size and type. Make sure the battery is properly seated and the cover is securely in place. Test the key fob to make sure it is working properly.
Conclusion
While it may seem like a small detail, the battery size in your key fob can have a big impact on its performance. By knowing the most common battery sizes and how to replace them, you can ensure that your key fob is always working properly when you need it.
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