How to Change The Battery in a Key Fob

A key fob is a small, handheld device that allows you to remotely control your car's locking system, alarm, and other features. 

Over time, the battery in your key fob may wear out and need to be replaced. Fortunately, changing the battery in a key fob is a quick and easy process that can be done at home with a few simple tools.

In this article, we'll walk you through the steps of changing the battery in a key fob so you can keep your car's remote control working smoothly.

What is a Key Fob?

A key fob, also known as a remote keyless entry system or RKE, is a small electronic device used to control a remote access system. It is typically used to lock and unlock doors, set an alarm, or open a car's trunk or hatch.

A key fob contains a small computer chip and an electronic transmitter that communicates with a receiver in the car. When a button on the key fob is pressed, the transmitter sends a signal to the receiver in the car, which then performs the desired action. Key fobs can be programmed to work with one or multiple cars, depending on the model.

In addition to controlling a car's remote access system, key fobs may also include other features, such as a panic button, a button to locate a parked car, or a button to start the engine remotely. Some key fobs may also have a small screen that displays information about the car's status, such as whether the doors are locked or the alarm is armed.

Key fobs are commonly used in modern cars as a convenient and secure way to control a car's remote access system. They are typically powered by a small battery that needs to be replaced periodically. 

How to Change The Battery in a Key Fob

The process of changing the battery in a key fob can vary depending on the make and model of the car. However, there are some general steps that you can follow to change the battery in most key fobs:

1. Determine the type of battery your key fob needs: Look in your car's owner manual or online to find out what type of battery your key fob needs. You can also open the key fob to see what type of battery is currently installed.
2. Purchase a replacement battery: Once you know the type of battery your key fob needs, purchase a replacement battery. You can usually find replacement batteries at a local automotive or electronics store.
3. Open the key fob: Look for a small notch or opening in the key fob. You can use a small screwdriver or a flat tool to pry open the key fob. Be careful not to damage the key fob or the battery inside.
4. Remove the old battery: Once the key fob is open, locate the battery and remove it. Some key fobs may have a clip that holds the battery in place, while others may have a spring that you need to press down to release the battery.
5. Install the new battery: Insert the new battery into the key fob, making sure that it is oriented correctly. The positive and negative ends of the battery should match the markings in the key fob.
6. Close the key fob: Carefully put the key fob back together and make sure that it snaps securely into place.
7. Test the key fob: Test the key fob to make sure that it is working properly. If it does not work, check to make sure that the battery is installed correctly and that the key fob is closed properly.

It's important to note that some key fobs may have different or more complicated procedures for changing the battery. If you are unsure about how to change the battery in your key fob, consult your car's owner manual or a professional mechanic.