What if the battery warning light is on?

Normally, it’s because the charging system isn't working. However, there are possibly some other causes other than the battery.

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In some cases, the battery has corroded cable terminals, damaged cells or plates inside or if it is leaking electrolyte. That means the battery itself is the source.

A loose or corroded battery cable or other wire connecting components of the charging system can become the reasons. Furthermore, perhaps the cause lies in the alternator or voltage regulator. The power stored in the battery is generated by the alternator. If the accessory belt driving the alternator is loose or broken or the alternator fails, your battery isn't being recharged.
 

 
In the case that the light turns on, you may be capable of making it home or to a service facility. You could totally operate the car provided that some juice is left in the battery. Nevertheless, if the charging system isn't working, your car will not run once the battery is drained. If you switch off the engine, you couldn’t restart it if the battery doesn't have enough power left to run the starter motor.

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In case you unfortunately encounter this situation, here are some suggestions for you:

1. At first, you should turn off as many electrical accessories as you can, namely the stereo, air conditioning or heater, and shirk using electrically operated controls such as power windows
2. In addition, you could increase the distance you can drive before the battery is discharged if you lessen the amount of electricity the car is consuming
3. Finally, get the charging system checked out to fix after finding to a mechanic as quickly as possible.

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