Battery Problem Acer Predator Helios 300 PH315-53.
I'm having a problem with my Acer Predator Helios 300 PH315-53. My battery says it is plugged in, but it will not charge fully. It decreases slowly over time and will shut off completely when I unplug it. I've tried looking online for solutions, but none have helped me (like resetting my drivers, restarting my computer and checking to see if my battery was plugged in on the inside). This problem occurred when I tried to slightly pull my laptop from my desk while it was still plugged (I even tried this gently) and the edge of my desk pulled the cord from my laptop, which caused it to turn off completely. Upon turning it back on it was at 20%, but saying it was plugged in. From there it started to slowly decrease in battery. I need help with this as I don't know what else to do.
[edited the title to add model name ]