Maserati GranTurismo Owner's Manual page 321

Useful Advice to Extend Battery
Life
When parking the vehicle, make sure
that the doors, hood, boot lid and flaps
are properly closed. All interior lights
should be off.
When the engine is turned off, do not
keep the connected devices switched
on for a long time (such as radio, hazard
warning lights, fan, etc.).
CAUTION!
If the battery charge remains below
50% for a long period of time, it will
be damaged due to sulphation; its
performance and starting power will be
reduced and it will be more subject
to freezing (this can happen even at
-10°C/14°F).
We recommend you to have the battery
charge condition checked, preferably
at the beginning of the cold season, to
prevent the electrolyte from freezing.
This check should be carried out more
frequently if the vehicle is used mainly
for short trips or if it is equipped with
power-absorbing devices that remain
permanently on even when the ignition
device is off. This applies above all if
these devices have been retrofitted
("Aftermarket" services).
If the vehicle is not used for long periods
of time, please see "Vehicle Stored for
Long Periods" in this section.
Battery Recharge
WARNING!
The process of charging or recharging
the battery produces hydrogen, a
flammable gas that can explode and
cause serious injuries. When charging
or recharging the battery, follow the
recommended precautions at all times.
• Before using a charger device always
check that this tool is suitable for
the installed battery, with constant
voltage (lower than 14.0 V) and low
amperage (maximum limit 15 A).
•
Recharge the battery in a well-
ventilated environment.
• Never charge or recharge a frozen
battery: it can explode due to
hydrogen trapped inside the ice
crystals.
• Ensure that any sparks or open flames
are kept well away from the battery
while it is charging.
• Before using a charger to charge or
maintain the battery charge status,
carefully follow the instructions
provided to ensure the charger is
Maintenance and Care
connected to the battery safely and
correctly.
Is possible to recharge the battery
without disconnecting the cables of the
vehicle electrical system.
• To access the battery lift the ground
coverage of the boot compartment
(see chapter "Tool Kit" section "In an
Emergency") and remove the battery
cover.
• Remove the protection cover and
connect the terminal clamp of the
charger positive cable (typically in red)
to the positive post (+) of the battery.
• Connect the terminal clamp of the
charger negative cable (typically
in black) to the nut located by the
negative post (–) on the battery,
indicated in the picture.
The vehicle is equipped with a IBS
(Intelligent Battery Sensor) sensor able
to measure charging and discharging
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