why my car battery light is on

When your car's battery light comes on, it's usually a sign that there is a problem with the charging system. The most common cause is that the alternator isn't properly charging the battery. It could be a loose or broken alternator belt, a faulty alternator itself, or maybe the battery has just gotten old and can't hold a charge anymore. Loose or corroded electrical connections can also disrupt power transmission, so that's another possibility. I recommend having the alternator's output voltage checked immediately. It should normally read between 13.5 - 14.5 volts. If it drops below 12 volts, your charging system is basically not functioning, and you're running solely on battery power. This increases the risk of stalling out, especially here in Malaysia where the hot weather speeds up battery drain. A useful tip: Regularly maintain your battery terminals to prevent oxidation. If you've got a non - sealed battery, keep an eye on the electrolyte levels too. Modern cars are packed with electronics these days, placing greater stress on the electrical system. Addressing problems at an early stage can save you from bigger electrical headaches down the line. And if the battery light comes on and your headlights are dimming or your electronics are acting up? Don't delay; get it checked immediately. In this situation, long - distance driving is not advisable to avoid being stranded.