On my 7640u I am quite satisfied with the battery life during work.
But I have a problem with the power consumption during sleep.
24hrs ago I closed the lid, at 68%.
Now I open up my laptop, plug in a charger, and it’s at 0%.
Linux mint, hybrid-sleep enabled.
What should I do?
Because that is just simply not acceptable at all 
It basically makes my laptop incredibly unreliable; since I am used to always opening up a laptop and having a decent charge available (even after weeks, due to hybrid)
My 12 year old macbook air loses only like 15-10% max over a full day in sleep, probably even less.