What are the symptoms of a dead car battery?

[JustinRose]

Symptoms of a dead car battery: 1. Difficulty starting the car. When the engine is functioning normally, you can check the car battery and may need to replace or charge it promptly; 2. The headlights may dim when using devices like the dashcam or headlights, indicating the need to check the battery level; 3. If the battery warning light on the car's dashboard illuminates, it signals a problem with the car battery that requires immediate inspection. If the car battery fails, it should be replaced promptly to avoid greater losses while driving. A car battery, also known as a storage battery, is a type of battery that works by converting chemical energy into electrical energy. Car batteries are categorized into conventional batteries, dry-charged batteries, and maintenance-free batteries.

[DelKaylee]

A dead battery is such a common issue – my car has experienced it before. The most obvious symptom is difficulty starting the engine. When turning the key, the engine wheezes like an old ox gasping for breath, or sometimes only the dashboard lights up while the engine remains silent. The headlights also become dim and weak; what used to illuminate 20 meters at night now feels like lighting a candle. Those fancy electronic features inside the car start acting up too—the navigation screen suddenly dims, and the window buttons respond sluggishly no matter how hard you press them. Once, while trying to start my car in a parking lot, I noticed a faint sour smell. An experienced driver told me it’s a telltale sign of battery electrolyte evaporation. I always advise my friends to keep a portable jump starter handy, especially in winter when this problem occurs most frequently.

[LeLayla]

I remember last time helping a friend with a stalled car, I noticed classic symptoms of a weak battery. When turning on the headlights, the light was yellowish and flickering, just like bulbs with insufficient power. Wanting to listen to some music to pass the time, I found the audio system cutting in and out. The most dangerous part was when the battery warning light on the dashboard suddenly lit up—that red triangle symbol was unmistakably clear. The turn signals also became abnormal, flashing at an unusually fast rate when activated. I popped the hood to check and saw that the color of the battery's inspection window had changed from green to black. This is especially something to watch out for on long-distance drives, as the car often won't start after stalling midway.

[Maximilian]

I've experienced several instances of battery depletion. The most obvious symptom is the starter motor making a clicking sound during ignition, like a stuck gear turning but failing to start the engine. The power windows become sluggish, requiring a long wait after pressing the button before they move slightly. The air conditioning fan speed noticeably slows down, producing weak airflow. The electronic locks also malfunction, with doors automatically relocking after being unlocked. Now, I've developed the habit of sniffing for any sour smell before driving, as it could indicate battery aging and leakage. It's recommended to check for loose terminal connections every six months.