The normal battery life is approximately 2 years. Replace the batteries when the range of the transmitter begins to decrease to less than approximately 7 m (23 ft). Use one 3-volt CR2032 battery or the equivalent.

1. Insert a small bladed tool, or a small coin, at the slot provided near the key ring hole (5), between the two halves (6, 4) of the transmitter case.
2. Twist the small bladed tool, or small coin, between the two halves in order to separate the case.
3. Remove the battery (2) from the transmitter.

1. Install the battery (2) with the positive side down into the transmitter.
2. Ensure that the seal (7) is in position. Align the two halves of the case (6, 4), and snap the two halves together.
3. Verify the operation of the transmitter.
4. A malfunctioning transmitter may need resynchronization. Refer to Transmitter Synchronization .