Very weird. I installed Xfce4 and uninstalled it and for a bit there was this battery icon thing in the same position only I could see it. After I rebooted it went away but this thing is still here. What in the world is it?
Edit: it doesn’t appear in i3-gaps
Is that openbox?
By default, it starts trayer in the lower left corner and it shows as a 1px vertical line becuase it isn’t fully transparent. You can modify the trayer line in the ~/.config/openbox/autostart file to suit your needs.
Oh, okay. My (fake) OCD was raging when I saw it and couldn’t get rid of it.
What @PackRat said. I just uninstalled trayer as I use Tint2 for my system tray.