Welcome to FobBattery.com! We provide dozens of original videos, photos, and content on how to change car fob batteries! It’s not the most exciting of topics I know, but it’s been a labor of love to put together these guides. There are hundreds of different types of key fobs in existence, and we are working our way through all the major car brands to give you in-depth tutorials for all of them. Most key batteries are “CR” coin or key batteries – such as the CR 2450 key fob battery.
Below is our current list of brands we have built out a database of batteries and fobs for, along with tutorials on how to fix or replace / change them on some of the most popular cars in the world.
Vehicle Brands
Common Fob Batteries
The most popular car key fob battery is the CR2032. This is the most popular car key fob battery in the world. The numbers in the battery indicate the size of the battery in diameter (wide) and height (tall). So the 2032 battery is 20mm wide and 3.2mm tall. The C indicates a lithium chemistry battery. The R indicates the shape: Round.
Other common “button batteries” for key fobs include:
Popular Car Fobs
- Replacing BMW 3 Series Car Fob Batteries
- Replacing BMW 5 Series Car Fob Batteries
- Replacing BMW 7 Series Car Fob Batteries
- Replacing BMW X1 Series Car Fob Batteries
- Replacing BMW X3 Series Car Fob Batteries
- Replacing BMW X5 Series Car Fob Batteries
- Replacing BMW X6 Series Car Fob Batteries
- Replacing Ford F-150 Car Fob Batteries
- Replacing Ford Explorer Car Fob Batteries
- Replacing Ford Escape Car Fob Batteries
- How to replace a Ford Mustang key fob battery
- Replacing Scion xB Car Fob Batteries
- Replacing Scion xA Car Fob Battery
- Replacing Hyundai Santa Fe Car Fob Batteries
- Replacing Hyundai Elantra Car Fob Battery
- Replacing Hyundai Kona Car Fob Batteries
How-To Guides
- How-to replace a battery in a key fob
- Changing a BMW Comfort Access key fob battery vs non Comfort Access
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