Volvo S90 TWIN ENGINE 2019 Owner's Manual page 468

STARTING AND DRIVING
Battery drain
The electrical functions in the vehicle drain the
battery to varying degrees. Avoid using ignition
mode II when the engine is switched off. Use
ignition mode I instead, as this uses less electri-
cal current.
Note that certain accessories may also drain
power from the electrical system. Do not use
functions that use a lot of electrical current when
the engine is turned off. Examples of such func-
tions are:
blower
•
headlights
•
windshield wipers
•
audio system (especially at high volume).
•
If the starter battery voltage is low, a message is
shown in the driver display. The vehicle's energy-
saving function will then turn off or reduce certain
functions, such as the blower and/or the audio
system.
Charge the battery by starting the engine
–
and let it run for at least 15 minutes (driving
charges the battery faster than letting the
engine idle).
Related information
Start battery (p. 601)
•
Ignition modes (p. 429)
•
466
Jump starting using another battery
If the start battery is discharged, current from
another battery can be used to start the vehicle.
Jumper cable connecting points.
CAUTION
The charging point of the vehicle is only
intended for jump starting the vehicle in ques-
tion. The charging point is not intended for
jump-starting another vehicle. Using the
charging point to start another vehicle could
cause a fuse to blow, which would cause the
charging point to stop working.
If a fuse has blown, 12 V Battery Fuse failure
Service required
will be displayed in the instru-
ment panel. Volvo recommends contacting an
authorized Volvo workshop.
To avoid short circuits or other damage, the fol-
lowing steps are recommended when jump star-
ting the battery: