http://bugzilla.opensuse.org/show_bug.cgi?id=1095451 http://bugzilla.opensuse.org/show_bug.cgi?id=1095451#c10 --- Comment #10 from Ralf Czekalla <ralf@czekalla.com> --- Hello Kacpar, these devices usually have a very low battery power consumption and you are true: I also recognized on my devices that it stays on 90% for a long time and then after 1-2 years goes down rapidly in about some days. The reason for this behavior is in the battery characteristics curve. You see this behavior especially with devices which have a very low power consumption and the interior of the battery can keep a very stable equilibrium state of chemical and electrical power. During my chemistry studies I looked deeper into it. Let's see if I can find a wiki page for these batteries characteristics curves. Found one here https://www.mpoweruk.com/performance.htm. The curve falls at the beginning to something like 90% and then stays there for quite some time. The weaker the power consumption, the later the next fall comes and is then much steeper. At least with Solaar I could get a heads-up some days ahead when the battery died finally. This I had in several of my devices. Yes, Solaar is also working on our living room entertainment PC and I use it mostly every day for these Logitech K400* living room keyboard with mouse. Best Regards Ralf -- You are receiving this mail because: You are on the CC list for the bug.