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Battery charge suddenly drops from 100% to 0%

Ask Ubuntu Asked by Syndo rik on December 14, 2020

I have a DELL LATITUDE E7450 with battery issues. When it is fully charged (displaying 100%), after some time the battery charge drops suddenly from 100% to 0%. When I unplug the charger, it warns me that the computer will shut down, and it indeed shutdowns after a few minutes as if the battery was completely empty.

When I replug the charger with the battery at 0% charge after the bug, the whole system is much slower (meaning that it takes a lot of time to even load a web page or do other stuff), and I have to hard reboot to have the system back to normal.

Finally what I came across is that if I remove the battery (while it’s at 0%) and put it back, the display will be correct, and if I unplug and replug the charger after that there are no problems on the system.

The bug is usually happening if I let my computer plugged for a night. So I guess after several hours of charge, the bug happens.

I’m running on Ubuntu 18.04.3 LTS, and in the BIOS the state of my battery is Excellent.

[EDIT 1]
Battery capacity according to Power Statistics:

This is what I get with power statirstics

And this is the output of upower -i upower -e | grep 'BAT':

 /org/freedesktop/UPower/devices/battery_BAT0

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