How Long Can You Listen to Music After the Car Is Turned Off?
3 Answers
After the car is turned off, a 35Ah battery can play music for about 3 hours, while a 45Ah battery can last between 3 to 4 hours. Battery Capacity: The current battery capacity SOC (State of Charge) of the vehicle is equal to the remaining charge/usable capacity × 100%; however, these two values are generally measured indirectly through the ampere-hour integration method, which still has many errors. Moreover, as the battery degrades, these errors become increasingly significant. Power Battery: For power batteries, the discharge capability varies under different temperatures. For example, the usable capacity refers to the maximum charge (AH) that the battery can store in its current state. This value changes constantly, with the most obvious factor being aging. Over time, as the number of charge-discharge cycles increases, the usable capacity gradually decreases.
The duration a car can play music after turning off the engine varies depending on the vehicle, primarily determined by the battery condition. My car is a standard gasoline model with a battery capacity of about 50 ampere-hours, and the audio system power ranges between 50-100 watts, translating to an approximate consumption of 5 ampere-hours per hour. Theoretically, it could last 10 hours, but in reality, it's much less due to battery aging and temperature affecting performance, especially in winter when it may drop sharply. Last time, I turned off the engine to listen to music in a parking lot for two hours and nearly ran out of battery, making it difficult to start the engine. It's advisable not to exceed 1-2 hours and to check the battery charge indicator light. If you add phone charging or lights, the duration will be even shorter, so it's best to keep jumper cables handy.
I enjoy resting in the car and listening to music for entertainment after turning off the engine. Under normal usage, it can last 3-5 hours at medium volume, but this depends on battery health and the audio system. I've tested it with a new battery lasting 4 hours, while an older car battery only managed 1.5 hours before needing to start the engine to recharge. In summer heat, the battery drains faster—remember to turn off the AC and extra devices. For peace of mind, I always set a phone alarm to check the voltage every 45 minutes or carry a portable power bank as a backup. Avoid prolonged use to prevent startup issues the next day.
