Bug 417464

Summary: Limit battery charging to e.g. 80% to improve battery lifetime
Product: [Applications] systemsettings Reporter: Kjetil Kjernsmo <kjetil>
Component: kcm_powerdevilAssignee: Kai Uwe Broulik <kde>
Status: RESOLVED FIXED    
Severity: wishlist CC: bugseforuns, daniel-other+kdebug, isma.af, kde, kjetil, nate
Priority: NOR    
Version First Reported In: unspecified   
Target Milestone: ---   
Platform: Debian stable   
OS: Linux   
Latest Commit: https://invent.kde.org/plasma/powerdevil/-/commit/f6a1362ede4b23f0a5cb53c66d4f1885d1d84fdc Version Fixed/Implemented In: 5.20
Sentry Crash Report:

Description Kjetil Kjernsmo 2020-02-12 00:46:03 UTC 
SUMMARY

There's an interesting article on prolonging battery life at:
https://batteryuniversity.com/index.php/learn/article/how_to_prolong_lithium_based_batteries

They recommend: 

"To make this feature user-friendly, a device should feature a “Long Life” mode that keeps the battery at 4.05V/cell and offers a SoC of about 80 percent. One hour before traveling, the user requests the “Full Capacity” mode to bring the charge to 4.20V/cell."

So, it is basically my wish that this is implemented in KDE. You can't do that now, right? If not, it seems like Powerdevil would be a nice place to have a setting that limits the charge to a certain percentage of full, and then possibly a plasmoid or something that makes it really easy to override that like they suggest.

If I understand it correctly, there is stuff in TLP that can help with this, at least on some system, but I don't know if that's the appropriate way to implement it.
Comment 1 Nate Graham 2020-07-22 13:41:12 UTC 
As far as I know, only Lenovo laptops support this feature. However there is an open patch to implement it, happily: https://invent.kde.org/plasma/powerdevil/-/merge_requests/5
Comment 2 Ismael Asensio 2020-09-22 16:30:50 UTC 
MR https://invent.kde.org/plasma/powerdevil/-/merge_requests/5 was merged in 
Plasma 5.20