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Unplug your phone too, since every little volt counts. To eke out every minute of charge, turn off as many electronics as you can: radio, air conditioning, heated seats, even the headlights if it's daytime. Once you turn the engine off, it might not come back on again. Use whatever charge is remaining in the battery to get somewhere safe, either an auto repair shop or your home. If the battery isn't being charged, the electrical systems will start to fail. If there was enough juice for you to start the car, then you can safely drive the car on however much charge is remaining, but it won't last long - maybe 30 to 60 minutes max. Either way, it's something you want to check out. Your battery light, also called the dashboard battery indicator, is designed to let you know about an issue with your vehicles battery or charging system.
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It could also mean there is a minor problem with the battery like corrosion. If it stays on while the car is running, it probably means there's something wrong with the alternator. The battery light comes on when you start your car, and it might linger for a second or two, but it usually turns off pretty quickly. could be an early warning saying the battery or a cell in the battery is dying and. I have been out 3 or 4 times since and light still on, car runs fine when light on cant notice any difference. So, the light is telling you "your alternator is not properly charging." It's not telling you "your battery is bad or needs to be replaced immediately." You don't have enough information yet. Driving along earlier today in my 1999 T reg Focus 1.6 zetec and all of a sudden the battery light lit up on the dashboard, and has been on since. It looks like a little battery, or sometimes it says "Battery." A simple circuit looks at the voltage that the alternator is producing and turns the battery light on if that voltage is low. Because your car is so dependent on the battery, any car with a combustion engine and a 12-volt battery has a light on the dashboard that warns you if the recharging system fails.
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