It Shuts Down Automatically With New Battery At 80%

my acer aspire series 5750 model p5we0 shuts automatically when shutting down without warning only when running on the battery.By shut down, I don't mean that it goes through the normal shut down process for Windows. Rather it's as if someone pulled the plug while a desktop PC is running.Also, when the shut down occurs, it is usually accompanied by a very brief, audible noise (static). (Like the kind you hear in movies when people talking over their radios switch over to the other person - 'Over')The battery is a new one, purchased just last week. When the laptop is plugged in, it can run for hours without issue. Whether the laptop does or does not have the battery inserted when plugged in, does not make any difference.But when running only on the battery, if fully charged, it usually will last for about 30-60 mins (only today did it surpass about 80-90 mins) before shutting down.After such a shut down, if I attempt to power on the laptop again, it may or may not turn on.If it does turn on, there's no saying how long it'll stay on for - it could be as little as a few seconds or as much as 20 mins.If it doesn't turn on, I usually have to remove the battery once before I can start it again.Despite doing this, there are times when the laptop won't power up. It's only when I plug it in that the laptop has successfully powered on every time.On a few occasions, after such an improper shut down, I've found the laptop heating up either while charging or even with nothing connected but the battery, until I remove the battery. This doesn't happen on every occasion though.