The three main functions of the automotive battery are to:

1.     Supply power to the starter and the ignition system so that the engine can be cranked and started.

2.     Supplement the charger system when load requirements exceed the supply capability of the alternator.

3.     Act as a voltage stabilizer in the electrical system. The battery smoothies out or reduces temporarily the high voltages which may occur in the system, thereby protecting voltage sensitive components

The reason for Insufficient Charging:

• Fan belt loose.
• If any of the Stator winding fails.
• If a Diode burns and opens the circuit.
• If a Diode fails and allows AC to pass, then it causes unpredictable behaviors of various sensors and processors. AC ripple is harmful to the battery.
• Worn out Slip rings or spring-loaded brushes of the Rotor.

• Failure happens when the charge controller fails.

• Battery gets overcharged and failure of various electrical components in the car.

When too much voltage occurs, you should do the things below:

• Fill each cell up to an upper level which is battery grade sulfuric acid of Sp Gr.1.260+0.01@25C.

• For better activation cranking, allow the battery to stand 20 minutes after filling.

• Keep the battery surface clean and dry.

• Protects terminals with petroleum jelly to prevent corrosion.

• Check electrotype level periodically and acid only distilled water to restore the upper level.

• Ensure that cable clamps are fixed tightly.

• Before filling the battery, check the electrical system of the vehicle.

• Check the charging system periodically and be sure that the battery gets proper charging.

When too much voltage occurs, you should not do the things below:

• Do not remove the sealing tape on the vent plug until the battery is ready for filling acid.

• Do not overfill acid above the upper level.

• When you try to fix the cable clamps to the terminal posts, prevent strong hitting on the posts.

• Never add acid to restore the upper level.

• Keep away explosive materials /gases from the battery.

You can increase the batteries lifetime by:

•       Select the appropriate battery for specific applications
•       The battery that meets the OE requirement and external standards will last longer than an under-rated unit.
•        Battery replacement charts for all vehicle types and models are available and should be followed. 

Physical fitment of the car’s Battery:

•       Footprint area of the battery and the car battery space should match.
•       Battery should be tightly fixed using the hold-down clamp.

Keep the engine and alternator well maintained:

•       A poorly maintained engine generally induces greater under hood temperatures and higher vibration.
•       A charging system that provides 14 – 14.8 V (Average 14.4 volts) under all conditions will recharge the battery without damaging its internal components.
•       The Alternator belt should be tight and the carbon bush should not be in worn-out condition.

Battery care during idle time:

•       For prolong non-use of the battery it is advisable to remove the negative terminal cable of the battery.
•       Key offload should not be more than 35 mille Amps. It shows external loads other than parasitic loads like a clock, computer, and alarms.
•       Battery terminals to be checked and tightened and the battery top should be maintained clean and dry. (Leakage voltage Neg Terminal-Battery Top < 0.5 volts).