What are the signs of a dead car battery?

1 Answers
DeKatherine
07/29/25 5:59pm
Signs of a dead car battery include: the battery warning light on the dashboard will illuminate, and the engine will fail to start. Indicators of a fully charged battery: 1. The terminal voltage rises to its maximum and remains stable for two hours without further increase; 2. A large number of bubbles are generated inside the battery; 3. Observe the battery indicator eye—a green color indicates a full charge. A car battery, also known as a storage battery, is a type of battery that works by converting chemical energy into electrical energy. Typically, the term 'car battery' refers to a lead-acid battery, which is mainly made of lead and its oxides, with a sulfuric acid solution as the electrolyte. The lifespan of a car battery depends not only on its structure and quality but also on proper usage and maintenance. Generally, a car battery lasts about 2 years, but with proper care, it can last 3 to 4 years.
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