Volvo S90 2019 Owner's Manual page 242

KEY, LOCKS AND ALARM
||
Insert a new battery with the positive side
(+) facing upward. Do not touch the con-
tact surfaces of the remote key battery.
Place the edge of the battery down-
ward into the holder. Slide the battery for-
ward until it locks into place under the two
plastic catches.
Press the battery downward until it
locks into place under the upper black
plastic catch.
NOTE
Use batteries with the designation
CR2032, 3 V.
240
NOTE
Volvo recommends that batteries used in
the remote control key satisfy UN Manual
of Test and Criteria, Part III, sub-section
38.3. The factory installed batteries and
batteries replaced by an authorized Volvo
workshop satisfy the above criterion.
Replace the battery cover and turn it
clockwise until it points to CLOSE.
Put the rear cover back into position
and press it down until it clicks into place.
Slide the cover back.
> A second click indicates that the cover
is correctly positioned and locked into
place.