How Long Can You Drive When the Battery Light Comes On?
2 Answers
When the battery light comes on, it is usually because the generator is not charging the battery. Relying solely on the battery voltage, the car can generally travel about 20 to 30 kilometers. Below is some relevant information: Causes: The battery light will illuminate if the generator's output voltage is lower than the battery voltage, the generator is not working, or there is a fault in the power supply circuit. What to do when the warning light comes on: When the warning light comes on, you need to assess and check the car to determine whether it is safe to continue driving. Generally, if a yellow warning light comes on, you can still continue driving. However, if a red light comes on, you should find a safe place to stop as soon as possible.
I've been driving for over 20 years and have encountered several instances where the battery light suddenly came on. In such cases, it indicates a possible alternator failure, and it's hard to say exactly how long the car can run on battery power alone. I once tried driving a new car with a fully charged battery, using only basic lights, and barely managed to reach a repair shop in forty minutes. But another time with an old car and an aging battery, with the air conditioning and music on, the engine died in less than ten minutes. The key factors are the battery's condition and the vehicle's electrical load – power-hungry items like air conditioning and headlights will drain the battery faster. From a safety perspective, when the light comes on, don't risk continuing to drive. Immediately turn off non-essential devices (like air conditioning and chargers) and find a safe place to stop for inspection or call a tow truck. Stopping in the middle of the road is dangerous, especially since power steering and brake assist systems may fail. It's advisable to check the battery condition every two years as preventive maintenance against such sudden issues.
