What does it mean when a car displays 'Low Battery, Please Start the Engine'?

[VanDelilah]

The message 'Low Battery, Please Start the Engine' in a car means that the car's battery power is insufficient and the engine needs to be started to charge the battery. The functions of the battery are: 1. To provide a strong starting current to the starter when starting the engine; 2. To assist the generator in supplying power to electrical devices when the generator is overloaded; 3. To supply power to electrical devices when the engine is idling; 4. To protect the car's electrical appliances. The maintenance methods for the battery are: 1. Start the car regularly to charge the battery; 2. Add distilled water or a special replenishing fluid when the electrolyte is low; 3. Regularly check if the small holes on the battery cover are ventilated during daily driving; 4. Check if the positive and negative terminals of the battery are oxidized; 5. Check for any aging or short circuits in the circuit; 6. Turn off electrical devices when leaving the car.