My laptop battery used to last 2-3hrs, and from one day to another its autonomy dropped to 15 mins, and a few hours later it wasn't functioning at all any more (as soon as I unplug the power cord, the laptop turns off).
I did some research online, and people say that a battery autonomy drops little by little, but that it is rare that it stops working like that, and that it could be a system issue.
The battery icon always says currently estimating charge.
I got a Thinkpad T520 and I'm on Ubuntu 18.10. I updated my system to the latest version hoping that it would solve the problem, but it didn't.
Does anyone have an idea what the problem count be?