Honda Acura RLX Hybrid 2016 Owner's Manual page 135

uuLocking and Unlocking the DoorsuKey Types and Functions
Models without two-way keyless
access remote
Release Knob
Built-in Key
Models with two-way keyless
access remote
Release Knob
Built-in Key
134
The built-in key can be used to lock/unlock the
doors when the keyless access remote battery
becomes weak and the power door lock/
unlock operation is disabled.
To remove the built-in key, pull it out while
sliding the release knob. To reinstall the built-
in key, push the built-in key into the keyless
access remote until it clicks.