Subaru Forester 2013 Owner's Manual page 482

11-56
Maintenance and service/Replacing battery
5. Remove the old battery.
6. Fit a new battery (type CR-1620 or
equivalent) in the case with its positive (+)
side facing upward.
7. Put the case together by fitting the
mating part of the button side into the hook
on the key side.
After the battery is replaced, the trans-
mitter must be synchronized with the
remote keyless entry system's control
unit. Press either the " " or "
several times to synchronize the unit.
" button