I'm not sure about all of these, but I have a 98 Taurus and the battery light came on. After a few days, the car died altogether and I had to replace my alternator. I would definitely take the battery indicator seriously and have your alternator checked.
The battery light usually comes on if there is a charging system problem Either battery or alternator are the usual causes.
It has to be a dead charging system.... usually a short internal in the alternator
Usually, overcharge, sometimes overdischarge. Check the alternator - the regulator is probably shorted.
Try checking the battery, cables, alternator, voltage regulator and cylanoid. These are USUALLY one of the causes.
either the alternator or the voltage regulator are no good.may also be a bad battery
Defective alternator or internal voltage regulator is bad.
=== === Some types of electrical shorts do cause the battery to discharge. But usually a bad alternator just does not charge the battery. Or does not put a large enough charge back into the battery. This causes the battery to discharge when you start and run the motor. The spark plugs and other things need electricity that would usually come from the alternator is now coming from your battery. If your bad alternator is not recharging the new battery, the battery will soon fail to start or run your vehicle. You need to have your alternator tested. It should be putting out at least 12 volts, usually around 13 to 15 volts.
Your battery is weak, or your your alternator is not charging battery.
Failed battery, or alternator is overcharging.
poss alternator fault
Can be loose or corroded battery connections, loose drive belt, or the alternator is failing.