How do I replace the battery in the RKE transmitter (Keyless Access version)?

Press the button on the side of the RKE transmitter to remove the key, then separate the two halves using a flat tool inserted near the key slot. Remove the old battery by pushing it toward the bottom of the transmitter, then insert a new CR2032 or equivalent battery with the positive side facing the back cover. Ensure the silicone mat is correctly positioned with no gaps or wrinkles, then press the halves firmly together and reinsert the key. (Page 17)