Volvo XC90 Owner's Manual page 637

Starter battery
The electrical system is single-pole and uses
the chassis and engine casing as a conduc-
tor.
The starter battery is used to start up the
electrical system and drive the starter motor
as well as other electrical equipment in the
car.
The starter battery should be replaced by a
22
workshop .
The car has a voltage-regulated AC alternator.
The starter battery is a 12 V battery, designed
for the carbon dioxide reducing functions
Start/stop and regenerative charging, and to
support the functionality of the car's different
systems.
The service life and function of the starter bat-
tery is influenced by factors such as the num-
ber of starts, discharging, driving style, driving
conditions, climatic conditions etc.
Never disconnect the starter battery when
•
the engine is running.
Check that the cables to the starter bat-
•
tery are correctly connected and properly
tightened.
22 An authorised Volvo workshop is recommended.
WARNING
The battery can generate oxyhydrogen
•
gas, which is highly explosive. A spark
can be formed if a jump lead is con-
nected incorrectly, and this can be
enough for the battery to explode.
Do not connect the jump leads to any
•
fuel system component or any moving
part. Be careful of hot engine parts.
The battery contains sulphuric acid,
•
which can cause serious burns.
If sulphuric acid comes into contact
•
with eyes, skin or clothing, flush with
large quantities of water. If acid
splashes into the eyes - seek medical
attention immediately.
Never smoke near the battery.
•
Charging points
When connecting an external starter battery or
battery charger, use the car's charging points
in the engine compartment.
The battery terminals on the car's starter bat-
tery in the luggage/cargo area must not be
used.
During charging, both the starter battery and
the support battery are charged.
MAINTENANCE AND SERVICE
Positive charging point
Negative charging point
IMPORTANT
When charging the starter battery and the
support battery, only use a modern battery
charger with controlled charging voltage.
Fast charging function must not be used
since it may damage the battery.
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