A triangular object viewed from my backyard during a cloudy night.

I'll start with the background of the observer. I've always been a skeptic when it comes to UFOs especially since a lot of the time when I hear about sightings in my area drugs or alcohol were involved and I assume the witnesses saw an airplane as I do live near an airport. However, last night I was staring out my window after hearing a couple of loud cars drive past (I have an interest in cars and was curious to see if I could see what they were). There wasn't much to see as I live in the city and it was cloudy but that made the dark isosceles triangle I saw in the sky stand out even more. Somewhere around 9:50 PM I noticed a triangle that seemed to have a faint glowing white outline just hovering still in the air. Around the same time, my phone restarted on its own as well as the motion-sensing lights in my backyard had flickered twice. After the second flicker, the shape was gone. If it weren't for the sudden issues with my electronics I would have tried to come up with a more rational explanation of what I saw but I can't come up with anything. Airplanes tend to fly that low here, but not when it's cloudy and they definitely don't hover.