Most key fob batteries will typically last between 3 and 5 years, but this may also depend on factors such as the frequency of use, the conditions the keys are stored in, and the quality of the battery.
If your key fob doesn’t include a conventional car key, you’re going to need to spot the signs of a deteriorated battery before it goes dead to avoid being stranded or having to get your car towed. A simple replacement could keep the car central locking system working for years to come.
Signs that the key fob battery needs to be replaced:
- Reduced range – You may notice that you have to stand closer and closer to the car for the key fob to work properly.
- A lack of or delayed response – If the response is slow or there is no response at all when you press the buttons, a flat battery is the most likely cause. However, sometimes it has something to do with the car’s electrical/locking system.
- Intermittent problems – If it’s working one moment and isn’t the next, it’s likely that the battery is starting to fail.
Where to get the car key battery replaced
If you need a new car key battery, you can visit your nearest dealership, a garage, or a local battery shop to get it replaced. You could also buy a new battery online and replace it yourself. The process of actually installing the fob battery is a lot simpler than you might think.
However, it’s important to get the right one for your specific key fob as they can vary between the different types. The replacement costs may also be affected by the make and model of the vehicle as some have more complex fobs than others. It’s also a good idea to replace it in good time to avoid emergency service fees.
What battery for my car key fob?
Most regular car key fobs use either a CR2032 or a CR2016 lithium battery. If you aren’t sure what battery your key has, you can check the vehicle owner’s manual or manufacturer's information online. Otherwise, you can remove the battery and check its markings. It’s important to get the right size and capacity for it to work properly.
How to change the car key battery at home
- Get the right battery for your specific car key model
- Prepare the tools you need – You should only need a small Phillips head screwdriver and a flat head screwdriver or coin.
- Move the key out of the way – If the key folds into the fob, you may need to remove it to access the battery. Most models have a button, switch or screw that allows you to detach it.
- Open it up – A. If there’s a screw on the back of the fob to remove the cover, slowly unscrew it using the right screwdriver. Put it somewhere safe like a zip bag so that you don’t lose it. B. Most fobs have a small dent on the side that allows you to pry it open using either a flat head screwdriver or or a small coin. Work your way around the seam of the fob housing to open it.
- Once it is open, remove the old battery.
- Dispose of the battery safely in compliance with local regulations.
- Insert the new battery – make sure it is facing the right side up.
- Reassemble the key fob in reverse order.
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