It's just never sleeps. And there's no way to fix this.Every time you put it in your bag you would have to switch it off otherwise it ill heat up and drain the battery.They call it smart but it's bananas.If it's plugged in it will wake you up in the middle of the night with random noise and lit screen.So just keep in mind that if you do not want to loose your project you MUST not put it to "sleep" but close everything and turn it off.