You will notice a decrease in range as the battery deteriorates. Transmitter battery replacement is suggested every 12 months, depending how frequently the remote is used.
The remote has a red LED light which can be used to indicate the battery strength. If the LED does not light up when buttons are pressed, or if it lights up weakly, then the battery should be replaced.
1. Remove the screw.
2. Carefully unsnap the top case from the bottom case.
3. Remove dead battery.
4. Close remote.
5. Screw it closed.