Comment # 8 on bug 1095451 from Kacper Pluta

(In reply to Ralf Czekalla from comment #7)
> Created attachment 823775 [details]
> Selective screenshot of Solaar with newest Logitech device I have showing
> battery status
> 
> This is a screenshot of Solaar with my newest Logitech device I have at
> hand, a K400plus.
> 
> I haven't seen any problems with Logitech devices over the last years with
> Solaar. Only the really old receivers with PS2 connectors are not recognized
> because the kernel is not yet extended for these old ones.  
> 
> Not sure if the ltunify might cause your problems offering somehow similar
> options but AFAIK has not such a nice KDE5/plasma interface as shown in the
> screenshots Solaar can offer.

Ralf, the problem is not lack of battery information but the fact that these
values are just not true. For my K780 keyboard solaar always shows 90% but the
battery is more than a year old so this is not true as (verified on Windows).
For my M720 mouse I have random values like 5, 20 or 10 percent. Each time you
connect this mouse you got different value.

The hope is on the kernel side: see here
https://news.softpedia.com/news/linux-kernel-5-2-to-come-with-improved-support-for-logitech-wireless-devices-526200.shtml

So, yes solaar gives you something but are you sure these values make any
sense?