Ford Focus Owner's Manual page 167

Locks and Security
Intelligent Access key (IA key)
1. Press and hold the push buttons
2
on the edges of the transmitter to
release the cover. Carefully remove
1
the cover.
2. Remove the key blade.
1
3. Twist a flat object in the position
shown to separate the two halves of
the transmitter.
4. Carefully insert a flat object in
the position show to open the
transmitter.
5. Carefully pry out the battery with a flat object.
Note: Please refer to local regulations when disposing of transmitter
batteries.
6. Install a new battery with the + facing downward.
7. Assemble the two halves of the transmitter back together.
8. Install the key blade.
167
2012 Focus (foc)
Owners Guide, 5th Printing
USA (fus)