pamsilva/bat-level

Dummy battery level tracking

Had some issues with my Thinkpad P1 Gen2, where the battery level suddenly dropped to 0% by mistake. Created this to process the logs and visualise the data. The problem seems to be gone ever since I updated the bios version to the latest version available.

Logging the data

Used this:

while true; do echo `date` \| ` upower -i /org/freedesktop/UPower/devices/battery_BAT0 | grep percentage ` \
\|  `upower -i /org/freedesktop/UPower/devices/battery_BAT0 | grep "time to empty" ` \
\|  `upower -i /org/freedesktop/UPower/devices/battery_BAT0 | grep "voltage" ` \
\|  `upower -i /org/freedesktop/UPower/devices/battery_BAT0 | grep "energy-rate" ` >> battery-level.data; sleep 15; done

To log the battery usage a few more details.

Visualising the data

Dummy script that uses pandas to load and process the data from a text file into the different cycles; and matplotlib to plot the result. You'll need to edit the script to update any paths that need to match your own system.

You can see the battery level dropping to 0% from about 50% around 20h.

Haven't seen that happening after upgrading the bios, but I still see random spikes to 100% battery level.