bug#39491: 28.0.50; two bugs in battery-upower

[lg . zevlg]

> 26 мая 2020 г., в 20:42, Stefan Monnier <monnier@iro.umontreal.ca> написал(а):
> 
> 
>> 
>>> I will get spare time very soon, and will come back to this. I did not 
>>> forget about it :)
>> Thanks!
> 
> How 'bout we revert to the /sys backend as default, in the mean time?

Multiple batteries setup is so popular in Emacs world?  We can detect multiple 
batteries and fallback to backend supporting them