Step-by-Step Guide on Changing a Key Fob Battery

Bank Street Toyota: How to change Key Fob Battery

Have you ever found yourself in a situation where your car key or remote control suddenly stops working? One of the most common reasons behind this issue is a depleted battery. The good news is that replacing the battery in your key is a simple task that you can do on your own. In this blog post, we will provide you with a step-by-step guide on how to change a key battery and get your device up and running again.

Step 1: Identify the Key Type and Battery:

The first step in replacing a key battery is to identify the type of key you have. Car keys and remote controls come in various shapes and sizes, and each may have a different method of accessing the battery compartment. Once you have determined the key type, consult the user manual or conduct a quick online search to find the specific battery model required for your key.


Step 2: Gather the Necessary Tools:

Before starting the battery replacement process, gather the necessary tools. Typically, you will need a small flat-head screwdriver or a coin (such as a penny or a nickel) to open the battery compartment. Some keys may also require a small Phillips-head screwdriver or a precision screwdriver set.


Step 3: Locate the Battery Compartment:

Now, locate the battery compartment on your key. In most cases, the battery compartment is on the backside of the key. However, some keys may have a sliding cover or a hidden compartment, so make sure to examine the key thoroughly to find the access point.


Step 4: Open the Battery Compartment:

Using the appropriate tool (screwdriver or coin), carefully open the battery compartment. Insert the tool into the designated slot or groove, and apply gentle pressure to pry open the compartment cover. Be cautious not to use excessive force to avoid damaging the key or the battery compartment.


Step 5: Remove the Old Battery:

Once the battery compartment is open, you will see the old battery inside. Take note of the battery’s orientation to ensure you install the new battery correctly. Using your fingers or a non-metallic tool, gently remove the old battery from its housing. If the battery is held in place with a clip or a small metal tab, release it to free the battery.


Step 6: Insert the New Battery:

Now it’s time to insert the new battery into the key. Take the fresh battery and carefully align it in the same position and orientation as the old battery. Ensure that the positive (+) and negative (-) terminals of the battery align correctly with the markings inside the battery compartment.


Step 7: Close the Battery Compartment:

Once the new battery is in place, close the battery compartment by aligning the cover and pressing it back into position. If your key requires screws to secure the compartment, tighten them using the appropriate screwdriver.


Step 8: Test the Key:

With the battery replaced and the battery compartment securely closed, it’s time to test your key. Press any button on the key to check if it functions properly. If the key still doesn’t work, double-check the battery orientation and ensure it is correctly seated.



Changing a key battery is a straightforward process that you can easily do yourself. By following the steps outlined in this guide, you can save time and money by avoiding a trip to a locksmith or dealership. Remember to exercise caution during the process to prevent any accidental damage. Now that you have the knowledge, go ahead and give your key a new lease on life!