How often should car key batteries be replaced?

[McDallas]

Generally, the battery life of a car key is about five years. A remote key allows you to unlock and lock the doors from a distance without inserting the key into the keyhole. Its greatest advantage is that, regardless of day or night, you don't need to locate the keyhole or go through the hassle of inserting the key to open the door; you can conveniently unlock the car from a distance. Symptoms indicating a car key battery is running low: Key malfunction: When remotely locking or unlocking the doors, the key sometimes works and sometimes doesn't. There are instances where you need to press the button multiple times before getting a response, which indicates the car key battery is nearly depleted. Shortened remote range: If you could previously unlock the doors from 10 meters away but now need to be close to the car to do so, this is another sign the battery is running low.