Ford Focus Owner's Manual page 62

62 Keys and Remote Control
5. Carefully pry out the battery with a flat object.
6. Install a new battery with the + facing downward.
7. Assemble the two halves of the transmitter back together.
8. Install the key blade.
Intelligent Access Key (Type 2)
1. Remove the backup key from the transmitter.
4. Insert a new battery with the + facing downward. Press the battery
down to make sure it is fully in the housing.
5. Snap the battery cover back onto the transmitter and install the
backup key.
Car Finder
Press the lock button on the key twice within three seconds. The horn
will chirp and the turn signals will flash. It is recommended that this
method be used to locate your vehicle, rather than using the panic
alarm.
2013 Focus (foc)
Owners Guide gf, 1st Printing
USA (fus)
2. Twist a thin coin in the slot
hidden behind the backup key slot
to remove the battery cover.
3. Remove the old battery.