How to change a battery in car key

Have you ever been locked outside your car, wondering how to get in? Or, have you noticed that your car key is not working as efficiently as it used to? These problems often arise when the battery in your car key is dead or dying. Instead of calling a locksmith or a mechanic, changing the battery in your car key is a quick and easy fix that anyone can do.

Replacing the battery in your car key is a simple task that requires a few basic tools and a new watch battery. By following these easy steps, you can change the battery in your car key in just a few minutes and avoid potential lockouts or other issues.

Whether you have a traditional car key or a newer model with keyless entry, this guide is designed to help you change the battery in your car key quickly and easily. With a little bit of patience and some basic know-how, you can change your car key battery and get back to your day without any hassle.

How to Change a Battery in Car Key

Step 1: Determine the Type of Battery

The first step to changing a battery in your car key is to determine the type of battery required. Car keys use different types of batteries depending on the make and model of the vehicle. The most common types of batteries used in car keys are coin-cell batteries (CR1616, CR1620, CR1632 or CR2025), so it is essential to check the type of battery required before purchasing a replacement.

Step 2: Open the Key Fob

The second step is to open the key fob. Most car key fobs have a small slot on the side or the back where the key can be inserted to open the case. Once the key is inserted, gently pull on the key to pop open the fob. If your key doesn’t have a slot, it may be screws holding the case together. In this case, use a small screwdriver to remove the screws.

Step 3: Remove the Battery

The next step is to remove the dead battery. Typically, the battery is held in place by a clip or a bracket. Once you have found the clip or bracket, gently release it to remove the battery. Be careful not to damage any wires or components in the key fob.

Step 4: Replace with a New Battery

Now that you have removed the old battery, it’s time to replace it with a new one. Simply insert the new battery into the slot where the old one was located. Ensure that the positive and negative terminals of the battery are facing in the correct direction.

Step 5: Close the Key Fob

Once you have replaced the battery, it’s time to close the key fob. Align the two halves of the fob together and push them firmly together. If the key is held together by screws, use the screwdriver to reattach them.

Congratulations! Your key fob has a new battery and should work perfectly. Remember to dispose of your old battery properly, as they contain chemicals that are harmful to the environment.

Step One: Gather Necessary Tools

Battery Replacement Kit

The first step in changing a battery in a car key is to gather the necessary tools. You will need a battery replacement kit, which typically includes a small screwdriver, replacement battery, and any necessary tools for opening the car key.

Extra Batteries

It is also recommended to have extra batteries on hand in case the replacement battery does not work or needs to be replaced again in the near future.

Clean Cloth

A clean cloth or towel is also helpful to have on hand to wipe away any dirt or debris on the car key and prevent it from getting into the key mechanism during the replacement process.

Stable Work Surface

Lastly, it is important to have a stable work surface to prevent the car key from falling or getting lost during the battery replacement process. A flat and stable surface such as a table or desk works best.

Step Two: Open Car Key

1. Identify the type of key

Before opening the car key, you need to identify the type of key you have. Some keys can be easily opened with just a screwdriver, while others may require a special tool or key blade.

2. Locate the opening point

Once you have identified the type of key, locate the opening point. This may be a small slot or a groove in the key. Use a small flathead screwdriver or a key blade to gently pry open the key.

3. Open the key

With the opening point located, gently pry open the car key. Take care not to damage the internal components of the key. If the key is difficult to open, do not force it.

4. Remove the battery

With the key open, locate the battery. It is usually a small round disc that is easily visible. Carefully remove the battery using a small flathead screwdriver or a pair of tweezers.

5. Replace the battery

Once the old battery is removed, insert the new battery into the same slot. Make sure the battery is inserted correctly, with the positive and negative terminals in the right position.

6. Close the key

With the new battery in place, snap the key casing back together. Make sure it clicks securely into place. Test the key to ensure that it is working properly.

Step Three: Replace Battery

1. Open the key fob

Locate the small slot on the side of the key fob. Insert a flathead screwdriver or a coin into the slot and gently twist to open the case. Some key fobs may have screws that need to be removed before opening.

• Insert flathead screwdriver or coin into slot
• Gently twist to open case
• Remove screws if necessary

2. Remove old battery

Once the key fob is open, carefully remove the old battery. You may need to use a small flathead screwdriver to help pry out the battery. Be sure not to damage the battery or any other components inside the key fob.

• Carefully remove old battery
• Use screwdriver to help pry out battery if needed
• Avoid damaging battery or other components

3. Insert new battery

Insert the new battery in the same position as the old battery. Make sure it is securely in place and facing the correct way. Use a small flathead screwdriver or your fingernail to push the battery into its slot, if necessary.

• Insert new battery in same position as old battery
• Ensure it is securely in place and facing the right way
• Push battery into slot if necessary

4. Close the key fob

Carefully place the key fob cover back onto the key fob. Press the cover until it snaps into place. Some key fobs may require screws to be reinserted.

• Carefully place cover back onto key fob
• Press until it snaps into place
• Reinsert screws if necessary