Dell 15 7579 is getting shut down automatically when not connected to AC power
I have brought one Dell 15 7579 laptops just 4 months back. I have started facing one issue now with the performance of the laptop. Even though I have the battery fully charged then also it is getting shut down when not connected to AC power. I am really worried about this problem as this is just 4 months old laptop. PLease suggest me what should I do for this.