Honda 2007 RDX Owner's Manual page 148

Remote Transmitter
Replacing the Transmitter
Battery
If it takes several pushes on the
button to lock or unlock the doors
and the tailgate, replace the battery
as soon as possible.
Battery type: CR1616
142
KEYPAD
SCREW
To replace the battery:
1. Remove the screw at the base of
the transmitter with a small
Phillips-head screwdriver.
2. Separate the keypad from the
transmitter by pushing any button
from outside.
BATTERY
3. Place a cloth on the edge of the
keypad, and remove the upper half
by carefully prying on the edge
with a small flat-tip screwdriver.