It affects little bit on laptop speakers, But you will feel it more on headphones and speakers. It has an 80Wh battery. This laptop supports super rapid charging. The battery charges up to 30% in 10 minutes and up to 70% in 30 minutes. And you can expect a battery backup of 5-6 hours easily. If you use it on IGPU mode, with brightness around 50-60%. If you turn off the keyboard backlight, you can get a backup of 5-6 hours easily. Even more than that or less than that, it depends on how you are doing the task.