That being said, I hate this, with my old laptop I could close the lid and pop it in the bag and it would lose maybe 5-10% battery per day, with new laptop it happily unsleeps itself in the bag which has zero ventilation.
So for safety reasons I have to shut my laptop down before putting it in my bag, then have to wait for it to start up (which is slow due to corporate software) before being able to use it again.