Swapping a Key Fob Battery Takes a Few Minutes and Costs Far Less Than a New Key You can replace a key fob battery yourself in a few minutes with a small screwdriver and a coin cell that costs a few ...

How Does Your Key Fob Work? The key fob uses wireless technology with a frequency of 433 MHz. There are receivers/transmitters on the vehicle and the key, so they can communicate with each other. This ...