DIY Guide: How to Change the Battery in Your Car Key

Car keys have become an essential part of our daily lives, and we rely on them to start our vehicles and keep them secure. However, over time, the battery in your car key will begin to lose its power, and you’ll need to replace it. In this blog post, we’ll walk you through the process of changing the battery in a car key.

Step 1: Determine the type of battery

The first step in changing the battery in your car key is to determine the type of battery your key uses. Most car keys use a small, round battery known as a coin cell battery. However, some car keys may use a different type of battery, such as a button cell or lithium-ion battery. Check the owner’s manual for your car or consult a professional to determine the type of battery your key uses.

Step 2: Purchase a replacement battery

Once you know the type of battery your key uses, purchase a replacement battery. Coin cell batteries can be found at most electronic stores, and they are relatively inexpensive. Make sure to purchase the correct size and voltage for your key.

Step 3: Open the key

Now it’s time to open the key. Most car keys have a small slot or button that allows you to access the battery compartment. Use a small flat-head screwdriver or a coin to gently pry open the key. Be careful not to damage the key or the battery compartment.

Step 4: Remove the old battery

Once the key is open, carefully remove the old battery. Some batteries may be held in place with a small clip or adhesive tape. Use a pair of tweezers or a small flat-head screwdriver to gently pry the battery out of its holder.

Step 5: Insert the new battery

With the old battery removed, insert the new battery into the holder. Make sure to insert the battery with the correct polarity. Most batteries have a small plus (+) or minus (-) sign to indicate the correct orientation.

Step 6: Test the key

Before closing the key, test it to make sure the new battery is working correctly. Press the buttons on the key to ensure that the key is sending signals to the car.

Step 7: Close the key

Finally, close the key by snapping the two halves together. Make sure that the key is securely closed and that the battery is seated correctly. Test the key again to ensure that it is working correctly.

Changing the battery in a car key is a simple process that can be done at home with just a few tools. By following these steps, you can keep your car key working properly and avoid the frustration of a dead battery. If you have any questions or concerns, consult a professional for assistance.