As boring as it may sound, I didn't do anything special, just the run of the mill practices: lowering brightness, running `powertop` and setting all tunables to

As boring as it may sound, I didn't do anything special, just the run of the mill practices: lowering brightness, running `powertop` and setting all tunables to "Good". At idle, this gives me ~3 Watts usage. With the 46 Wh battery, that's 15 hours. Of course when I start using the laptop that's halved more or less. With the screen off (when I'm using the external screen), it goes down to ~2 Watts, for a whopping 23 hours battery life at idle. I remember an Acer Travelmate I purchased back in 2009. The lowest I could get the power consumption was 7 Watts at idle. I'd say Intel for the most part, has come a long way in power efficiency. EDIT: I use Mate Desktop BTW.