There are car remote battery systems as a keyless entry fob for modern cars these days. If you have one, you must have a question like “How to Replace a Car Key Battery?”

You may come across a situation where you reach your car and click the button but nothing happens. The door won’t unlock suddenly. That just means your car key battery has died, and needs a replacement.

There are also instances where you may have lost your car key or it can get damaged, don’t worry, you can get Remote Key Fob Repair services from Keyenzy’s locksmiths in no time.

So, let’s discuss some of the most important topics such as “ What is a Key Fob?” and “How to charge car key battery” under this blog. There may be many things you don’t know about your car key fob and this article can inform you better.

What is a Car Key Fob?

A car key fob is a small, compact remote control device used to start, lock, and unlock the car without having to insert a key into the lock or ignition. The car remote cell (battery) gives power to it. They work on a car key programming system.

This system works on radio frequency (RF) signals to send commands to the car. Modern key fobs can also include features such as:

• Remote start: Start the car from a distance.
• Trunk release: Open the trunk remotely.
• Panic button: Sound the car's alarm in case of an emergency.
• Keyless entry/start: Some cars allow you to enter and start the vehicle just by having the fob nearby.

Cars or vehicles in general that have keyless entry and ignition systems work with Key fobs. It improves the convenience factor and security.

Recommended read: Pros And Cons Of Smart Car Keys

How to replace a Car Key Battery?

Car key fobs, just like other devices that require a battery, can simply die. Often, they fail when we most need them, which can be quite frustrating at times. Fortunately, the batteries are easy to replace.

If you’re wondering How to Replace a Car Key Battery, it is a simple process. Below is a guide on how to change the battery in a car key fob.

1. Look inside the plastic housing to see the type of batteries

Certain key fobs let you see the type of battery from its exterior. After confirming the type you purchase it from the store. Make sure that the size and type match the requirements.

You can perform this action without even opening the key fob in advance, saving you a lot of time and energy in the process.

There are several different popular brands available to you, including Panasonic, Energizer, and Duracell.

2. Look for the seam where the key fob comes together

Key fobs open up in a shell, which means that there are 2 halves that snap together. This is the portion that can be split into two parts.

They usually have a notch in the seam that makes the whole process of prying the key fob into two easier.

You shouldn’t hang anything else from the keyring other than the fob if your car requires the key to be inserted into the ignition to get started.

3. Take the key fob apart gently

Use a small tool to pry apart the 2 seams of the key fob. You can even use your fingernails and it will do the work.

Now take the car key fob from the seams apart and gently open the casing down the middle.

Newer cars with just about any type of key fob and RFID keys won't allow you to lock your keys inside the car. Taking the key fob apart is an incredibly simple process.

4. Battery terminals-check the positive and negative ends

It would look like a small coin in form and appearance. The size of the battery would be embossed on it apart from having a plus and a minus sign. Place the battery in the proper orientation as required, by gently slotting it in. It should go in the same manner in which the old battery was inserted.

5. Take out the old battery and replace it with the new one

The battery should, by default, have an inbuilt spring to pop the battery out of place. If that is not the case, then with the flat-bladed screwdriver, carefully pry it out. Replace the old battery with the new one in the exact same plus and minus orientation as the old one.

6. Reassemble the fob

Now, assemble the key fob in reverse order from how you took it apart. Snap the two pieces of the key fob back together and check to see if the buttons are now working. It should be as good as new.

Explore more: Lost Your Smart Key? Here's Your Guide to Smart Car Key Replacement

How to Secure Your Car Remote Battery?

Manufacturers of wireless key fobs need to make sure these devices are secure. While key fobs are generally safer than traditional keys, thieves can still find ways to exploit them if they're not properly protected. These security weaknesses in RFID keyless entry systems need to be fixed.

Modern keyless entry systems are designed to stop their signals from being intercepted by other devices. Many key fobs use a code that changes every time you lock or unlock the car, making it harder for anyone to steal the signal and gain access to the vehicle.

Conclusion

Modern cars come with a key fob. They can be attached with a traditional key in a key ring. It is basically a car remote with a battery to communicate with your car and send it a signal to start, lock, and unlock the door.

Having such a device you need to know how to replace a car key battery, and we tackle the topic in this blog. We have also covered how a car key fob works.

Frequently Asked Questions

Q. Is it possible to change car key battery myself?

Ans: Yes, you can. You can try the key fob apart and replace the coin battery inside with a new battery. However, if that’s too tricky for you, get a professional locksmith for car key services.

Q. How long should a car remote battery last?

Ans: Your car key battery may last around three to four years before it needs replacing. But, it may need replacing before this period. It all depends on the remote’s usage.

Q. What do I do if my car remote cell dies?

Ans: You can start by placing the key fob by the start button for ignition. If that doesn’t work, check for a backup slot to physically insert the key fob. You can also use the manual key for access instead if you have it for your vehicle.

Q. What happens if I don't change car key battery of my vehicle?

Ans: If you don’t change it timely, it can cause your key fob to stop communicating with your car properly. In such a case, your key fob will require reprogramming. An auto locksmith from platforms like Keyenzy can help you with your car key problems.