[all/fso?] external battery "just mobile gum pro" woes

[arne anka]

> Unfortunatelly there is no dbus call in FSO for that yet.

ok, looking deeper, i have to echo something into /sys/... -- but the file  
is rw for root only.
is there an easy, non-hackish way to set the rw for normal users, too?

all tools/scripts listed in the wiki seem to presume using the fr as root,  
there's no provision made for limited rights, afaics.