I think my note 8 must've died, not sure how that happened considering I kept it on the charger all night and then used it for 15 minutes, before returning it to thee charger 4 hours later. So it shouldn't have been below 50%, at the least.
But when I picked it up a couple hours after plugging it in when I got home, I noticed the battery sign that pops up when you plug your android in when it's turned off was there, it's empty though and has a that "loading" circle but it's frozen (as in the circle is not rotating). The screen is flicking on and off, it'll pop on with the battery still empty and the loading sign for maybe 5 seconds, then go black for 5 seconds, then go back on. When I unplugged it and tried to turn it off it didn't get past the screen saying the device's name before it went black. Also didn't help when I tried to plug it in quickly before it went black.
What should I do? It's been doing this for a while. Should be at least a little charged by now.