TATA Motors Indigo LE Owner's Manual & Service Book page 100

Use a proper wrench to loosen and remove cables from the terminals.
Always disconnect the negative (-ve) cable first and reconnect it
last.
Clean the battery terminals with a terminal cleaning tool or wire brush.
Reconnect and tighten the cables, coat the terminals with petroleum
jelly.
If you need to connect the battery to a charger, disconnect both cables
to prevent damage to the vehicle's electrical system.
Charging the battery with the cables connected can seriously damage
your vehicle's electrical/electronic equipment.
Detach the battery cables before connecting the battery to a charger.
Swallowing electrolyte can cause fatal injury if immediate action is
not taken.
Do not reverse the battery connection on the vehicle as it may
damage the vehicle electricals.
Negative terminal is connected to the body/cab.
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CMYK +ve No. 92
NOTICE
CAUTION
NOTICE
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MAINTENANCE & CAR CARE — Battery
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