Volvo XC40 Owner's Manual page 223

key can be ordered from an authorized Volvo
workshop.
CAUTION
An end-of-life Key Tag must be turned in to
an authorized Volvo workshop. The key
must be deleted from the vehicle because
it can still be used to start the vehicle via
backup start.
Opening the key and replacing the
battery
Hold the remote key with the front side
(with the Volvo logo) facing up and move
the button on the key ring section to the
right. Slide the front cover slightly upward.
The cover will loosen and can be
removed from the key.
7 Included in vehicles equipped with keyless locking/unlocking*.
Turn the key over, move the button to
the side and slide the rear cover slightly
upward.
The cover will loosen and can be
removed from the key.
KEY, LOCKS AND ALARM
Use a screwdriver or similar object to turn
the battery cover counterclockwise so the
markers point to OPEN.
Remove the cover carefully by pressing
e.g. a fingernail into the indentation.
Pry the cover up.
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