TATA Motors Indigo eCS Owner's Manual & Service Book page 114

MAINTENANCE & CAR CARE
BATTERY :
Check the battery for proper electrolyte level and corrosion
on the terminals.
WARNING
During normal operation, the battery generates gas which
is explosive in nature, a spark or open flame can cause
the battery to explode causing very serious injuries.
Keep all sparks & open flames and smoking materials
away from the battery.
Getting electrolyte in your eyes or on the skin can cause
severe burns. Wear protective clothing and a face shield
or have a skilled technician to do the battery
maintenance.
The battery contains sulphuric acid (electrolyte) which
is poisonous and highly corrosive in nature.
1. Check the battery for electrolyte level against the
marking on the battery outer case.
2. Check the battery terminals for corrosion (a white or
yellowish powder). To remove it, cover the terminals with
a solution of baking soda. It will bubble up and turn
brown.
When this stops wash it off with plain water. Dry off the
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battery with a cloth or paper towel. Coat the terminal
with petroleum jelly to prevent future corrosion.
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.
NOTICE
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.
CAUTION
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.
BATTERY