Motorola SD4590 Guide De L'utilisateur page 18

Base Unit
The base station uses 4 AAA alkaline batteries (not
included) for optional backup power.
1 Press the cover latch with a screwdriver to lift and
remove the battery cover.
2 Insert 4 AAA alkaline batteries into the
battery compartment.
3 Insert the tabs of the cover into the slots on the base
station and press down until the cover clicks into
place.
Note: The corded handset will work during a power
outage with or without the backup batteries.
3