The size of the battery for a key fob can vary depending on the make and model of the vehicle. However, the most commonly used battery for key fobs is the CR2032. Other commonly used button cell batteries for key fobs include CR2450, CR2025, CR1616, and CR2016
. These are small, round, button or coin cell batteries, and the size is often stamped on the side of the key fob for convenience
. If you are unsure about the battery size for your specific key fob, you can usually find this information in your vehicle's owner's manual or consult a professional for assistance
