How to Determine if the Battery is Dead?

[Denise]

Methods to determine if a car battery is dead: 1. If the engine fails to start twice, it indicates insufficient voltage and a dead battery; 2. For batteries used over a year, press the horn before starting the car—if the sound is weaker than before, it means the battery is low on charge; 3. Check by turning on the headlights—bright white light indicates a normal battery, while dim red light suggests insufficient power; 4. The simplest method is to observe the battery warning light on the dashboard—a constant light indicates low charge; 5. Maintenance-free batteries have an indicator window—blue or green means normal, while white means the battery is dead.