If you have a car key remote, it’s important to know how to replace a battery in it. Here are some tips:

  1. Open the door of the car and remove the key from the ignition.
  2. Disconnect the negative battery cable from the car key remote.
  3. Remove the old battery by pulling it out of its housing.
  4. Insert the new battery into its housing and connect the negative cable back to the car key remote.