Would you mind sharing what setup you have that lets you get such long battery life?
But get power top installed. Make sure in the 4th screen in power top and make sure all settings are to "good". I made a systemd unit to do this for me know boot. I also installed tlp and have it set it's settings. Some of those cross over into what powertop does.
I set some things on the i915 driver but that will have to wait until baby watch is over.
Does it for me.
The T450s generation (and the generation before it) use ULV processors (ultra low voltage).
The processors used in the T450s generation have a TLP of 15W.
The processors used in the X220 generation have a TLP of 35W.
On the flip side, the processors in the X220 generation (and in the next generation) are powerful, which is a good thing if you need the power and if you have the laptop plugged most of the time.
Modern T-series still have amazing damn battery life, and I’ve never found anyone else who comes close except Apple, or Android ARM hybrids like the old ASUS Transformer Prime with the double batteries.
I wish to purchase a new battery for it and am looking for a place to buy a battery that
1. will ship to Norway without too high shipping cost, and
2. isn’t going to explode in my face.
Any suggestions?
Also, mbrumlow, what distro are you running? And did you customize it in anyway aside from using powertop that you mentioned, to get it to consume low amounts of power while idle?
You should be able to optimize and get even higher. I'm actually considering getting a new T480 (since it has the battery expanded slot), but I'm struggling to decide.
My idle times, browsing something like HN, or sitting in #emacs I get near 20 hours on my t450s and about 13 on my x220.
I think low low low idle power consumption is key to long infrequent charges. This is because the second you are not using your computer then it should also not be using power. For example, my t450s without adjusting the screen bigness idles at 2.8W, so tons of idle time with a 97WH battery.
You can't really optimize power for when you are using it. If you are compiling, you want the fastest compile time and use the most power. Same for other things that take power.
I go all weekend not charging my personal laptop and the only times I close the lid is when I am going to bed. Otherwise I leave the lid open, same brightness and walk away for hours and come back and continue where I left off.
So I see your point about people saying "I get 9 hours of battery life." doing nothing, but even 9 hours of doing nothing is fairly low, given I can make a 10 year old laptop get close to 18 hours, and a 4 year old one get near 21 hours "doing nothing".