Seat Mii 2020 Owner's Manual page 185

Avoid generating sparks when handling
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cables and electronic devices, or as a re-
sult of an electrostatic discharge.
Never short the battery terminals.
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Never use a damaged 12 volt battery. It
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could explode. A damaged 12 volt battery
should be replaced immediately.
Never use a frozen 12 volt battery. A dis-
●
charged 12 volt battery may freeze at a
temperature of just 0 °C (+32 °F). A frozen
12 volt battery should be replaced immedi-
ately.
CAUTION
The 12 volt battery should not be exposed
to direct sunlight for a long time.
Ultraviolet rays could damage the bat-
●
tery case.
CAUTION
If it is not going to be used for a long period
of time, the 12 volt battery should be pro-
tected from frost.
The 12 volt battery can freeze and be-
●
come unusable.
Note
When turning on the drive system with a
drained or newly replaced 12-volt battery,
or after a jump start, it is possible that
some system settings (time, date, personal
Verification and replacement
comfort options and programs) may be lost
or deleted. Check and correct these set-
tings once the 12-volt battery is sufficiently
charged.
Check the 12-volt battery electro-
lyte level
Sight glass on the top of the 12 volt
Fig. 165
battery (schematic representation).
The electrolyte level of the 12 volt battery
should be checked periodically in cases of
high mileage, in countries with hot climates
and if an old 12-volt battery is used. Other-
wise, the 12-volt battery is maintenance-free.
Preparations
Prepare the vehicle for work in the engine
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›››
compartment page 176
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Open the bonnet page 177
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Check the electrolyte level (12-volt bat-
teries with a sight glass)
Ensure sufficient lighting to clearly identify
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the colour indication displayed in the circular
sight glass located at the top of the 12-volt
›››
battery (arrow) Fig. 165. Never use naked
flames or objects that burn without a flame
as lighting.
The colour displayed in the circular sight
●
glass changes depending on the electrolyte
level in the 12-volt battery.
There are two different colours:
Yellow or colourless: The electrolyte level of
the 12-volt battery is too low. Go to a
specialised workshop to have the bat-
tery checked and replaced if necessary.
Black: The electrolyte level of the 12-volt bat-
tery is correct.
WARNING
Working on 12-volt batteries can cause se-
vere burns, explosions and electric shock.
Always wear protective goggles and
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gloves.
Electrolyte is highly corrosive. It can
●
caused skin burns and blindness. When
handling the 12-volt battery you must par-
ticularly protect your hands, arms and face
from splashes of electrolyte.
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