Volvo XC 90 Owner's Manual page 215

Use e.g., a screwdriver to turn the battery
cover counterclockwise so that the markers
align toward OPEN.
Remove the cover carefully by pressing
e.g., a finger nail into the indentation.
Pry the cover up.
Use a CR2032, 3 V battery.
4
The battery's positive (+) side is up. Pry
out the battery as shown in the illustration.
CAUTION
When handling batteries, avoid touching their
contact surfaces as this could result in poor
battery function in the remote key.
LOCKS AND ALARM
4
Insert a new battery with the positive (+)
side up. Put the battery cover back in place
by:
Placing the battery's edge downward in
the holder. Slide the battery forward so that it
is held in place by the two plastic catches.
Pressing the battery downward so that it
is also held in place by the two upper
catches under the upper black holder.
and turn until the marker points to CLOSE.
}}
213